Source: https://ailoot.ai/models/en/gemini-3-pro-image/
Canonical: https://ailoot.ai/models/en/gemini-3-pro-image/
Language: en

# Google: Nano Banana Pro (Gemini 3 Pro Image)

[Markdown](https://ailoot.ai/models/en/gemini-3-pro-image/index.md) · [JSON](https://ailoot.ai/models/en/gemini-3-pro-image/facts.json)

## [Google: Nano Banana Pro (Gemini 3 Pro Image)](https://ailoot.ai/models/en/gemini-3-pro-image/)

Nano Banana Pro (Gemini 3 Pro Image) is Google’s reasoning-driven image model for complex design, product mockups and factual visualisations. It accepts text and image references and generates images with text, with 1K–4K output and detailed creative control.

- [**Ailoot · Images** `POST /v1/images/generations` `gemini-3-pro-image`](https://ailoot.ai/models/en/gemini-3-pro-image/#method-0)
- [**Ailoot · Images** `POST /v1/images/generations` `gemini-3-pro-image-preview`](https://ailoot.ai/models/en/gemini-3-pro-image/#method-1)
- [**Ailoot · Images** `POST /v1/images/generations` `nano-banana-pro`](https://ailoot.ai/models/en/gemini-3-pro-image/#method-2)
- [**Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions` `google/gemini-3-pro-image`](https://ailoot.ai/models/en/gemini-3-pro-image/#method-3)
- [**Ailoot Ultra · Images** `POST /v1/images/generations` `google/gemini-3-pro-image`](https://ailoot.ai/models/en/gemini-3-pro-image/#method-4)
- [**Ailoot Ultra · Anthropic Messages** `POST /v1/messages` `google/gemini-3-pro-image`](https://ailoot.ai/models/en/gemini-3-pro-image/#method-5)

About the model

This description covers the model’s capabilities. Available in Ailoot inputs, outputs and options are listed for the selected method below.

Nano Banana Pro is Google’s Gemini 3 Pro Image model for image generation and editing driven by reasoning. The manufacturer places complex graphic design, high-fidelity product mockups and factual data visualisation at the centre of its intended use. It accepts text and images and produces image and text. This named Pro image edition is based on Gemini 3 Pro, while retaining its own image-task input and capability profile.

The model supports 1K, 2K and 4K images. Documented shapes include 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9 and 21:9. A square 4K image is 4096 × 4096; a 16:9 4K image is 5504 × 3072. Select resolution and aspect ratio for the artifact you need, whether a portrait poster, product scene or wide explanatory graphic. The 0.5K option and additional extreme ratios of Gemini 3.1 Flash Image are not part of this Pro table.

Text rendering supports clear lettering in posters, diagrams and other designed assets. For a complex infographic, provide the underlying facts, exact wording, a reading sequence and the relation between labels and visual elements. Separate the information to communicate from the desired artistic style. Google recommends preparing the text first and then generating the image containing it. This is particularly useful when a composition combines a headline, a diagram and several short captions.

Multi-image input supports up to 14 references. Google’s feature table describes up to six object references for fidelity, up to five character references for consistency and up to three style references. These roles help prepare a composite visual: a product photograph defines appearance, a separate picture establishes setting and a style image informs treatment. Tell the model which details are authoritative and which references provide inspiration, rather than asking it to combine every visible feature indiscriminately.

Google Search grounding can supply real-world information for a factual visualisation or a scene informed by current conditions. The Pro image workflow documents web grounding; the Image Search extension is documented specifically for Nano Banana 2.1 and Gemini 3.1 Flash Image. For a data graphic, supply the values you intend to show or request grounded information in the producer workflow, then make the relationship, labels and layout explicit. Search-informed generation still produces an image to review, not a substitute for checking the depicted facts.

Reasoning supports the composition of a complex prompt before final rendering. The image guide describes interim images used to test composition and logic, distinct from the final artifact. Do not transfer Nano Banana 2’s minimal/high control table or Nano Banana 2.1’s medium-default table to this Pro edition. For a demanding design, give a complete brief with the visual hierarchy, required object relationships and the elements that must survive later edits.

The model card describes substantive remaining limits: very small text and long passages may render poorly, character appearance can change between a reference and a result, and masked or doodle edits may only partly follow the instruction or leave marks. It can also confuse left and right or copy a source element into the new composition. For a product revision, explicitly state the preserved geometry and labels and inspect the edited area; for a diagram, compare the direction of arrows and relative object positions.

The current API table gives an input limit of 65,536 tokens and an output limit of 32,768 tokens. Image generation, thinking, search grounding and batch processing are supported; audio generation, function calling, code execution, caching, structured outputs, file search, URL context and Live API are unsupported. The image task accepts neither audio nor video input in this profile. Generated images include SynthID, and a requested number of output images is not always followed exactly.

A practical product brief can combine an image of the product, a lighting reference and the exact headline: “Preserve the product’s proportions and lettering, show it on a pale stone surface under soft side light, and leave the upper third clear for the supplied heading.” For a factual diagram, identify each entity and connection and provide the approved labels. Refine the result in a conversation by naming one change and the features to preserve, keeping the selected image and its explanatory text together as the design artifact.

Practical task

### Visualize a supplied packaging cycle

Technical example in English

```
Visualize a supplied packaging cycle

Create one landscape explanatory graphic showing this packaging return cycle: customer returns an empty jar, store inspects it, accepted jars are washed, clean jars are refilled. Use four large illustrated stages connected clockwise. Add only these exact labels: 'RETURN', 'INSPECT', 'WASH', 'REFILL'. Make the arrow direction and stage order unmistakable.
```

#### Expected result

```
One landscape image with four labeled stages and arrows matching the supplied cycle.
```

#### Check the result

```
Inspect that arrows connect RETURN to INSPECT to WASH to REFILL in that order, with exact labels.
```

**Ailoot · Images** `POST /v1/images/generations` `gemini-3-pro-image`

[`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image&fmt=images)

Google /`gemini-3-pro-image`

Model ID

- `gemini-3-pro-image`
- `gemini-3-pro-image-preview`
- `nano-banana-pro`

### Overview

Nano Banana Pro (Gemini 3 Pro Image) is Google’s reasoning-driven image model for complex design, product mockups and factual visualisations. It accepts text and image references and generates images with text, with 1K–4K output and detailed creative control.

Accepted inputs

Text

Results

Images

### Available in Ailoot · inputs & methods

**Ailoot · Images** `POST /v1/images/generations`

Input types

`text`

Output types

`image`

Context

65,536 tokens

Maximum output

32,768 tokens

Output format

Image file

| Field | Type | Requirement | Values & limits | Default |
| --- | --- | --- | --- | --- |
| Field`model` | Type`string` | RequirementRequired | Values & limits gemini-3-pro-image | Default— |
| Field`prompt` | Type`string` | RequirementRequired | Values & limits Minimum length: 1 | Default— |
| Field`n` | Type`integer` | RequirementOptional | Values & limits Minimum: 1 | Default1 |
| Field`response_format` | Type`string` | RequirementOptional | Values & limits url, b64\_json | Default— |
| Field`stream` | Type`boolean` | RequirementOptional | Values & limits | Defaultfalse |
| Field`size` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`quality` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`background` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`output_format` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`output_compression` | Type`integer` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`moderation` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`input_fidelity` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`style` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`partial_images` | Type`integer` | RequirementOptional | Values & limits Model-specific | Default— |

Input material combinations

**Text to image** · Required: prompt

Method parameters and lifecycle

| Parameter | Contract |
| --- | --- |
| Parameter`material_types` | Contracttext |
| Parameter`required` | Contractmodel, prompt |
| Parameter`optional_controls` | Contractnull |
| Parameter`content_type` | Contractapplication/json |

Lifecycle: `synchronous_result_then_owned_library`

`GET /v1/media/tasks/{task_id}` · actual returned task\_id or media library record

`GET /v1/media/assets/{asset_id}/content`

`GET /v1/media/assets`

`GET /v1/media/assets/{asset_id}`

Method shapes and IDs are exact; supplier capability is separate from admission.

### Pricing

#### Ailoot method rates

Input

$0.002 */ 1K image tokens*

Output

$0.134 *per 1K image*

Output

$0.134 *per 2K image*

Output

$0.24 *per 4K image*

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/)

#### Reference tariff details

Model-level reference schedules do not change method selection, quotes or charges. Active charges use the selected Ailoot method rates.

Model reference schedules

#### Prices by configuration

| Configuration | Rate schedule | Charge |
| --- | --- | --- |
| ConfigurationUltra | Rate scheduleBase rate | Charge Input · Input tokens **$0.004000** / 1K tokens Output · Output tokens **$0.024000** / 1K tokens Input · image **$0.004000** / 1K tokens Output · image output **$0.24000** / 1K tokens Input · audio **$0.004000** / 1K tokens Input · input audio cache **$0.0004000** / 1K tokens Output · web search **$0.028** per web search Output · internal reasoning **$0.024000** / 1K tokens Input · Cache read **$0.0004000** / 1K tokens Input · Cache write **$0.000750000** / 1K tokens |

### Example requests

#### Ailoot · Images

curlPython SDKNode.js SDK

```bash
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
export AILOOT_API_KEY
export AILOOT_API_KEY
: "${AILOOT_PROMPT_FILE:?Set your actual UTF-8 image brief}"
export AILOOT_PROMPT_FILE
python3 - <<'PY_REQUEST'
import json,os
from pathlib import Path
p=json.loads('{"model": "gemini-3-pro-image", "prompt": ""}')
f=Path(os.environ["AILOOT_PROMPT_FILE"])
if not f.is_file():raise SystemExit("Choose your actual UTF-8 brief")
p['prompt']=f.read_text(encoding="utf-8")
if not p['prompt'].strip():raise SystemExit("Brief must contain text")
Path("request.json").write_text(json.dumps(p,ensure_ascii=False))
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/images/generations \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o result.json
python3 - <<'PY_RESULT'
import base64, json, os, subprocess
from pathlib import Path
from urllib.parse import urlsplit, urljoin

def save_images(items):
    if not items: raise SystemExit("No completed images; retain the full response")
    for index, item in enumerate(items):
        encoded=item.get("b64_json")
        uri=item.get("url", "")
        if not encoded and uri.startswith("data:image/"):
            header, separator, encoded=uri.partition(",")
            if not separator or ";base64" not in header: raise SystemExit("Unsupported image data URI")
        if encoded:
            raw=base64.b64decode(encoded,validate=True)
        elif uri:
            uri=urljoin("https://api.ailoot.ai",uri)
            parsed=urlsplit(uri)
            if parsed.scheme!="https" or not parsed.netloc or parsed.username or parsed.password:
                raise SystemExit("Invalid returned image URL")
            owned=parsed.netloc=="api.ailoot.ai" and parsed.path.startswith("/v1/media/assets/") and parsed.path.endswith("/content")
            args=["curl","--fail-with-body","--silent","--show-error",uri]
            if owned: args += ["-H","Authorization: Bearer "+os.environ["AILOOT_API_KEY"]]
            temporary=Path(f"image-{index}.bin")
            subprocess.run(args+["-o",str(temporary)],check=True)
            raw=temporary.read_bytes()
            temporary.unlink()
        else: raise SystemExit("Image has neither bytes nor URL")
        if not raw: raise SystemExit("Empty image result")
        ext="png" if raw.startswith(b"\x89PNG") else "jpg" if raw.startswith(b"\xff\xd8") else "webp" if raw[:4]==b"RIFF" and raw[8:12]==b"WEBP" else "svg" if raw.lstrip().startswith((b"<svg",b"<?xml")) else "bin"
        Path(f"image-{index}.{ext}").write_bytes(raw)
    print("Every returned image saved; complete response metadata retained")
save_images(json.loads(Path("result.json").read_text())["data"])
PY_RESULT
```

```python
from openai import OpenAI
import base64, json, os, subprocess
from pathlib import Path
from urllib.parse import urlsplit, urljoin

def save_images(items):
    if not items: raise SystemExit("No completed images; retain the full response")
    for index, item in enumerate(items):
        encoded=item.get("b64_json")
        uri=item.get("url", "")
        if not encoded and uri.startswith("data:image/"):
            header, separator, encoded=uri.partition(",")
            if not separator or ";base64" not in header: raise SystemExit("Unsupported image data URI")
        if encoded:
            raw=base64.b64decode(encoded,validate=True)
        elif uri:
            uri=urljoin("https://api.ailoot.ai",uri)
            parsed=urlsplit(uri)
            if parsed.scheme!="https" or not parsed.netloc or parsed.username or parsed.password:
                raise SystemExit("Invalid returned image URL")
            owned=parsed.netloc=="api.ailoot.ai" and parsed.path.startswith("/v1/media/assets/") and parsed.path.endswith("/content")
            args=["curl","--fail-with-body","--silent","--show-error",uri]
            if owned: args += ["-H","Authorization: Bearer "+os.environ["AILOOT_API_KEY"]]
            temporary=Path(f"image-{index}.bin")
            subprocess.run(args+["-o",str(temporary)],check=True)
            raw=temporary.read_bytes()
            temporary.unlink()
        else: raise SystemExit("Image has neither bytes nor URL")
        if not raw: raise SystemExit("Empty image result")
        ext="png" if raw.startswith(b"\x89PNG") else "jpg" if raw.startswith(b"\xff\xd8") else "webp" if raw[:4]==b"RIFF" and raw[8:12]==b"WEBP" else "svg" if raw.lstrip().startswith((b"<svg",b"<?xml")) else "bin"
        Path(f"image-{index}.{ext}").write_bytes(raw)
    print("Every returned image saved; complete response metadata retained")

f=Path(os.environ["AILOOT_PROMPT_FILE"])
if not f.is_file():raise SystemExit("Set your actual UTF-8 image brief file")
request={'model': 'gemini-3-pro-image', 'prompt': ''}
request["prompt"]=f.read_text(encoding="utf-8")
client=OpenAI(base_url="https://api.ailoot.ai/v1",api_key=os.environ["AILOOT_API_KEY"],max_retries=0)
result=client.images.generate(**request)
Path("sdk-result.txt").write_text(str(result),encoding="utf-8")
save_images([{"b64_json":getattr(item,"b64_json",None),"url":getattr(item,"url",None)} for item in result.data])
```

```js
import OpenAI from "openai";
import { readFileSync, writeFileSync } from "node:fs";
const key=process.env.AILOOT_API_KEY;
if(!key) throw new Error("Set your actual Ailoot API key");
const client=new OpenAI({baseURL:"https://api.ailoot.ai/v1",apiKey:key,maxRetries:0});
const request={"model": "gemini-3-pro-image", "prompt": ""};
if(!process.env.AILOOT_PROMPT_FILE)throw new Error("Set your actual UTF-8 image brief file");
request.prompt=readFileSync(process.env.AILOOT_PROMPT_FILE,"utf8");
const result=await client.images.generate(request);
writeFileSync("sdk-result.json",JSON.stringify(result,null,2));
if(!result.data?.length) throw new Error("No completed images");
for(let index=0;index<result.data.length;index++) {
  const item=result.data[index];let encoded=item.b64_json,uri=item.url||"",raw;
  if(!encoded && uri.startsWith("data:image/")) {
    const comma=uri.indexOf(",");if(comma<0 || !uri.slice(0,comma).includes(";base64")) throw new Error("Unsupported image data URI");
    encoded=uri.slice(comma+1);
  }
  if(encoded) {
    if(encoded.length%4!==0 || !/^[A-Za-z0-9+/]*={0,2}$/.test(encoded)) throw new Error("Invalid Base64");
    raw=Buffer.from(encoded,"base64");
  } else if(uri) {
    const u=new URL(uri,"https://api.ailoot.ai");
    if(u.protocol!=="https:" || u.username || u.password) throw new Error("Invalid returned URL");
    const owned=u.origin==="https://api.ailoot.ai" && u.pathname.startsWith("/v1/media/assets/") && u.pathname.endsWith("/content");
    const response=await fetch(u,{headers:owned?{Authorization:"Bearer "+key}:{},redirect:"manual"});
    if(!response.ok) throw new Error("Image content download failed: "+response.status);
    raw=Buffer.from(await response.arrayBuffer());
  } else throw new Error("Image has neither bytes nor URL");
  if(!raw.length) throw new Error("Empty image result");
  const ext=raw.subarray(0,4).equals(Buffer.from([137,80,78,71]))?"png":raw[0]===255&&raw[1]===216?"jpg":raw.toString("ascii",0,4)==="RIFF"&&raw.toString("ascii",8,12)==="WEBP"?"webp":raw.toString("utf8").trimStart().startsWith("<svg")||raw.toString("utf8").trimStart().startsWith("<?xml")?"svg":"bin";
  writeFileSync(`image-${index}.${ext}`,raw);
}
console.log("Every returned image saved; sdk-result.json retains complete metadata");
```

### Receive and save results

#### Ailoot · Images

Download each returned image or save its Base64 contents

- `GET /v1/media/tasks/{task_id}`
- `GET /v1/media/assets/{asset_id}/content`
- `GET /v1/media/assets`
- `GET /v1/media/assets/{asset_id}`

##### Keep all completed results

Save every completed image; retrieve each returned URL or decode its Base64 contents.

Save every data item. Decode each b64\_json or fetch every returned signed URL. Select a filename extension from the actual MIME/bytes.

##### If the original response needs checking

If an image generation or edit result requires a check, keep the original operation\_id/X-Client-Request-ID and returned result information. Recover existing owned results through the media library using actual task\_id or asset\_id values. Do not resubmit the generation/edit request or construct a polling URL from operation\_id.

Response fields

| Field | Type |
| --- | --- |
| Field`created` | Typeinteger |
| Field`data[].url` | Typestring |
| Field`data[].b64_json` | Typebase64 string |
| Field`usage` | Typeobject |

Errors and next steps

| Response | Condition | Next step |
| --- | --- | --- |
| Response400 · `invalid_request_error` | ConditionInvalid required fields, material representation or parameter value | Next stepCorrect the indicated fields before a new creation request. |
| Response`server_error` | ConditionThe returned response says the operation or result requires a check | Next stepKeep the original returned operation/task ID, request headers and response; continue supported reads of that original operation. Do not resubmit the creation request. |

### Aliases

#### Model aliases

<strong>Ailoot</strong> [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image&fmt=images), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview&fmt=images), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro&fmt=images)
**Ailoot Ultra** [`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=images)

#### Method path aliases

`/v1/images`

#### Related caller IDs

[`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=images), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview&fmt=images), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro&fmt=images), [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image&fmt=images)

**Ailoot · Images** `POST /v1/images/generations` `gemini-3-pro-image-preview`

[`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview&fmt=images)

Google /`gemini-3-pro-image-preview`

Model ID

- `gemini-3-pro-image`
- `gemini-3-pro-image-preview`
- `nano-banana-pro`

### Overview

Nano Banana Pro (Gemini 3 Pro Image) is Google’s reasoning-driven image model for complex design, product mockups and factual visualisations. It accepts text and image references and generates images with text, with 1K–4K output and detailed creative control.

Accepted inputs

Text

Results

Images

### Available in Ailoot · inputs & methods

**Ailoot · Images** `POST /v1/images/generations`

Input types

`text`

Output types

`image`

Context

65,536 tokens

Maximum output

32,768 tokens

Output format

Image file

| Field | Type | Requirement | Values & limits | Default |
| --- | --- | --- | --- | --- |
| Field`model` | Type`string` | RequirementRequired | Values & limits gemini-3-pro-image-preview | Default— |
| Field`prompt` | Type`string` | RequirementRequired | Values & limits Minimum length: 1 | Default— |
| Field`n` | Type`integer` | RequirementOptional | Values & limits Minimum: 1 | Default1 |
| Field`response_format` | Type`string` | RequirementOptional | Values & limits url, b64\_json | Default— |
| Field`stream` | Type`boolean` | RequirementOptional | Values & limits | Defaultfalse |
| Field`size` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`quality` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`background` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`output_format` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`output_compression` | Type`integer` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`moderation` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`input_fidelity` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`style` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`partial_images` | Type`integer` | RequirementOptional | Values & limits Model-specific | Default— |

Input material combinations

**Text to image** · Required: prompt

Method parameters and lifecycle

| Parameter | Contract |
| --- | --- |
| Parameter`material_types` | Contracttext |
| Parameter`required` | Contractmodel, prompt |
| Parameter`optional_controls` | Contractnull |
| Parameter`content_type` | Contractapplication/json |

Lifecycle: `synchronous_result_then_owned_library`

`GET /v1/media/tasks/{task_id}` · actual returned task\_id or media library record

`GET /v1/media/assets/{asset_id}/content`

`GET /v1/media/assets`

`GET /v1/media/assets/{asset_id}`

Method shapes and IDs are exact; supplier capability is separate from admission.

### Pricing

#### Ailoot method rates

Input

$0.002 */ 1K image tokens*

Output

$0.134 *per 1K image*

Output

$0.134 *per 2K image*

Output

$0.24 *per 4K image*

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/)

#### Reference tariff details

Model-level reference schedules do not change method selection, quotes or charges. Active charges use the selected Ailoot method rates.

Model reference schedules

#### Prices by configuration

| Configuration | Rate schedule | Charge |
| --- | --- | --- |
| ConfigurationUltra | Rate scheduleBase rate | Charge Input · Input tokens **$0.004000** / 1K tokens Output · Output tokens **$0.024000** / 1K tokens Input · image **$0.004000** / 1K tokens Output · image output **$0.24000** / 1K tokens Input · audio **$0.004000** / 1K tokens Input · input audio cache **$0.0004000** / 1K tokens Output · web search **$0.028** per web search Output · internal reasoning **$0.024000** / 1K tokens Input · Cache read **$0.0004000** / 1K tokens Input · Cache write **$0.000750000** / 1K tokens |

### Example requests

#### Ailoot · Images

curlPython SDKNode.js SDK

```bash
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
export AILOOT_API_KEY
export AILOOT_API_KEY
: "${AILOOT_PROMPT_FILE:?Set your actual UTF-8 image brief}"
export AILOOT_PROMPT_FILE
python3 - <<'PY_REQUEST'
import json,os
from pathlib import Path
p=json.loads('{"model": "gemini-3-pro-image-preview", "prompt": ""}')
f=Path(os.environ["AILOOT_PROMPT_FILE"])
if not f.is_file():raise SystemExit("Choose your actual UTF-8 brief")
p['prompt']=f.read_text(encoding="utf-8")
if not p['prompt'].strip():raise SystemExit("Brief must contain text")
Path("request.json").write_text(json.dumps(p,ensure_ascii=False))
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/images/generations \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o result.json
python3 - <<'PY_RESULT'
import base64, json, os, subprocess
from pathlib import Path
from urllib.parse import urlsplit, urljoin

def save_images(items):
    if not items: raise SystemExit("No completed images; retain the full response")
    for index, item in enumerate(items):
        encoded=item.get("b64_json")
        uri=item.get("url", "")
        if not encoded and uri.startswith("data:image/"):
            header, separator, encoded=uri.partition(",")
            if not separator or ";base64" not in header: raise SystemExit("Unsupported image data URI")
        if encoded:
            raw=base64.b64decode(encoded,validate=True)
        elif uri:
            uri=urljoin("https://api.ailoot.ai",uri)
            parsed=urlsplit(uri)
            if parsed.scheme!="https" or not parsed.netloc or parsed.username or parsed.password:
                raise SystemExit("Invalid returned image URL")
            owned=parsed.netloc=="api.ailoot.ai" and parsed.path.startswith("/v1/media/assets/") and parsed.path.endswith("/content")
            args=["curl","--fail-with-body","--silent","--show-error",uri]
            if owned: args += ["-H","Authorization: Bearer "+os.environ["AILOOT_API_KEY"]]
            temporary=Path(f"image-{index}.bin")
            subprocess.run(args+["-o",str(temporary)],check=True)
            raw=temporary.read_bytes()
            temporary.unlink()
        else: raise SystemExit("Image has neither bytes nor URL")
        if not raw: raise SystemExit("Empty image result")
        ext="png" if raw.startswith(b"\x89PNG") else "jpg" if raw.startswith(b"\xff\xd8") else "webp" if raw[:4]==b"RIFF" and raw[8:12]==b"WEBP" else "svg" if raw.lstrip().startswith((b"<svg",b"<?xml")) else "bin"
        Path(f"image-{index}.{ext}").write_bytes(raw)
    print("Every returned image saved; complete response metadata retained")
save_images(json.loads(Path("result.json").read_text())["data"])
PY_RESULT
```

```python
from openai import OpenAI
import base64, json, os, subprocess
from pathlib import Path
from urllib.parse import urlsplit, urljoin

def save_images(items):
    if not items: raise SystemExit("No completed images; retain the full response")
    for index, item in enumerate(items):
        encoded=item.get("b64_json")
        uri=item.get("url", "")
        if not encoded and uri.startswith("data:image/"):
            header, separator, encoded=uri.partition(",")
            if not separator or ";base64" not in header: raise SystemExit("Unsupported image data URI")
        if encoded:
            raw=base64.b64decode(encoded,validate=True)
        elif uri:
            uri=urljoin("https://api.ailoot.ai",uri)
            parsed=urlsplit(uri)
            if parsed.scheme!="https" or not parsed.netloc or parsed.username or parsed.password:
                raise SystemExit("Invalid returned image URL")
            owned=parsed.netloc=="api.ailoot.ai" and parsed.path.startswith("/v1/media/assets/") and parsed.path.endswith("/content")
            args=["curl","--fail-with-body","--silent","--show-error",uri]
            if owned: args += ["-H","Authorization: Bearer "+os.environ["AILOOT_API_KEY"]]
            temporary=Path(f"image-{index}.bin")
            subprocess.run(args+["-o",str(temporary)],check=True)
            raw=temporary.read_bytes()
            temporary.unlink()
        else: raise SystemExit("Image has neither bytes nor URL")
        if not raw: raise SystemExit("Empty image result")
        ext="png" if raw.startswith(b"\x89PNG") else "jpg" if raw.startswith(b"\xff\xd8") else "webp" if raw[:4]==b"RIFF" and raw[8:12]==b"WEBP" else "svg" if raw.lstrip().startswith((b"<svg",b"<?xml")) else "bin"
        Path(f"image-{index}.{ext}").write_bytes(raw)
    print("Every returned image saved; complete response metadata retained")

f=Path(os.environ["AILOOT_PROMPT_FILE"])
if not f.is_file():raise SystemExit("Set your actual UTF-8 image brief file")
request={'model': 'gemini-3-pro-image-preview', 'prompt': ''}
request["prompt"]=f.read_text(encoding="utf-8")
client=OpenAI(base_url="https://api.ailoot.ai/v1",api_key=os.environ["AILOOT_API_KEY"],max_retries=0)
result=client.images.generate(**request)
Path("sdk-result.txt").write_text(str(result),encoding="utf-8")
save_images([{"b64_json":getattr(item,"b64_json",None),"url":getattr(item,"url",None)} for item in result.data])
```

```js
import OpenAI from "openai";
import { readFileSync, writeFileSync } from "node:fs";
const key=process.env.AILOOT_API_KEY;
if(!key) throw new Error("Set your actual Ailoot API key");
const client=new OpenAI({baseURL:"https://api.ailoot.ai/v1",apiKey:key,maxRetries:0});
const request={"model": "gemini-3-pro-image-preview", "prompt": ""};
if(!process.env.AILOOT_PROMPT_FILE)throw new Error("Set your actual UTF-8 image brief file");
request.prompt=readFileSync(process.env.AILOOT_PROMPT_FILE,"utf8");
const result=await client.images.generate(request);
writeFileSync("sdk-result.json",JSON.stringify(result,null,2));
if(!result.data?.length) throw new Error("No completed images");
for(let index=0;index<result.data.length;index++) {
  const item=result.data[index];let encoded=item.b64_json,uri=item.url||"",raw;
  if(!encoded && uri.startsWith("data:image/")) {
    const comma=uri.indexOf(",");if(comma<0 || !uri.slice(0,comma).includes(";base64")) throw new Error("Unsupported image data URI");
    encoded=uri.slice(comma+1);
  }
  if(encoded) {
    if(encoded.length%4!==0 || !/^[A-Za-z0-9+/]*={0,2}$/.test(encoded)) throw new Error("Invalid Base64");
    raw=Buffer.from(encoded,"base64");
  } else if(uri) {
    const u=new URL(uri,"https://api.ailoot.ai");
    if(u.protocol!=="https:" || u.username || u.password) throw new Error("Invalid returned URL");
    const owned=u.origin==="https://api.ailoot.ai" && u.pathname.startsWith("/v1/media/assets/") && u.pathname.endsWith("/content");
    const response=await fetch(u,{headers:owned?{Authorization:"Bearer "+key}:{},redirect:"manual"});
    if(!response.ok) throw new Error("Image content download failed: "+response.status);
    raw=Buffer.from(await response.arrayBuffer());
  } else throw new Error("Image has neither bytes nor URL");
  if(!raw.length) throw new Error("Empty image result");
  const ext=raw.subarray(0,4).equals(Buffer.from([137,80,78,71]))?"png":raw[0]===255&&raw[1]===216?"jpg":raw.toString("ascii",0,4)==="RIFF"&&raw.toString("ascii",8,12)==="WEBP"?"webp":raw.toString("utf8").trimStart().startsWith("<svg")||raw.toString("utf8").trimStart().startsWith("<?xml")?"svg":"bin";
  writeFileSync(`image-${index}.${ext}`,raw);
}
console.log("Every returned image saved; sdk-result.json retains complete metadata");
```

### Receive and save results

#### Ailoot · Images

Download each returned image or save its Base64 contents

- `GET /v1/media/tasks/{task_id}`
- `GET /v1/media/assets/{asset_id}/content`
- `GET /v1/media/assets`
- `GET /v1/media/assets/{asset_id}`

##### Keep all completed results

Save every completed image; retrieve each returned URL or decode its Base64 contents.

Save every data item. Decode each b64\_json or fetch every returned signed URL. Select a filename extension from the actual MIME/bytes.

##### If the original response needs checking

If an image generation or edit result requires a check, keep the original operation\_id/X-Client-Request-ID and returned result information. Recover existing owned results through the media library using actual task\_id or asset\_id values. Do not resubmit the generation/edit request or construct a polling URL from operation\_id.

Response fields

| Field | Type |
| --- | --- |
| Field`created` | Typeinteger |
| Field`data[].url` | Typestring |
| Field`data[].b64_json` | Typebase64 string |
| Field`usage` | Typeobject |

Errors and next steps

| Response | Condition | Next step |
| --- | --- | --- |
| Response400 · `invalid_request_error` | ConditionInvalid required fields, material representation or parameter value | Next stepCorrect the indicated fields before a new creation request. |
| Response`server_error` | ConditionThe returned response says the operation or result requires a check | Next stepKeep the original returned operation/task ID, request headers and response; continue supported reads of that original operation. Do not resubmit the creation request. |

### Aliases

#### Model aliases

<strong>Ailoot</strong> [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image&fmt=images), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview&fmt=images), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro&fmt=images)
**Ailoot Ultra** [`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=images)

#### Method path aliases

`/v1/images`

#### Related caller IDs

[`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=images), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview&fmt=images), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro&fmt=images), [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image&fmt=images)

**Ailoot · Images** `POST /v1/images/generations` `nano-banana-pro`

[`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro&fmt=images)

Google /`nano-banana-pro`

Model ID

- `gemini-3-pro-image`
- `gemini-3-pro-image-preview`
- `nano-banana-pro`

### Overview

Nano Banana Pro (Gemini 3 Pro Image) is Google’s reasoning-driven image model for complex design, product mockups and factual visualisations. It accepts text and image references and generates images with text, with 1K–4K output and detailed creative control.

Accepted inputs

Text

Results

Images

### Available in Ailoot · inputs & methods

**Ailoot · Images** `POST /v1/images/generations`

Input types

`text`

Output types

`image`

Context

65,536 tokens

Maximum output

32,768 tokens

Output format

Image file

| Field | Type | Requirement | Values & limits | Default |
| --- | --- | --- | --- | --- |
| Field`model` | Type`string` | RequirementRequired | Values & limits nano-banana-pro | Default— |
| Field`prompt` | Type`string` | RequirementRequired | Values & limits Minimum length: 1 | Default— |
| Field`n` | Type`integer` | RequirementOptional | Values & limits Minimum: 1 | Default1 |
| Field`response_format` | Type`string` | RequirementOptional | Values & limits url, b64\_json | Default— |
| Field`stream` | Type`boolean` | RequirementOptional | Values & limits | Defaultfalse |
| Field`size` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`quality` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`background` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`output_format` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`output_compression` | Type`integer` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`moderation` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`input_fidelity` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`style` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`partial_images` | Type`integer` | RequirementOptional | Values & limits Model-specific | Default— |

Input material combinations

**Text to image** · Required: prompt

Method parameters and lifecycle

| Parameter | Contract |
| --- | --- |
| Parameter`material_types` | Contracttext |
| Parameter`required` | Contractmodel, prompt |
| Parameter`optional_controls` | Contractnull |
| Parameter`content_type` | Contractapplication/json |

Lifecycle: `synchronous_result_then_owned_library`

`GET /v1/media/tasks/{task_id}` · actual returned task\_id or media library record

`GET /v1/media/assets/{asset_id}/content`

`GET /v1/media/assets`

`GET /v1/media/assets/{asset_id}`

Method shapes and IDs are exact; supplier capability is separate from admission.

### Pricing

#### Ailoot method rates

Input

$0.002 */ 1K image tokens*

Output

$0.134 *per 1K image*

Output

$0.134 *per 2K image*

Output

$0.24 *per 4K image*

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/)

#### Reference tariff details

Model-level reference schedules do not change method selection, quotes or charges. Active charges use the selected Ailoot method rates.

Model reference schedules

#### Prices by configuration

| Configuration | Rate schedule | Charge |
| --- | --- | --- |
| ConfigurationUltra | Rate scheduleBase rate | Charge Input · Input tokens **$0.004000** / 1K tokens Output · Output tokens **$0.024000** / 1K tokens Input · image **$0.004000** / 1K tokens Output · image output **$0.24000** / 1K tokens Input · audio **$0.004000** / 1K tokens Input · input audio cache **$0.0004000** / 1K tokens Output · web search **$0.028** per web search Output · internal reasoning **$0.024000** / 1K tokens Input · Cache read **$0.0004000** / 1K tokens Input · Cache write **$0.000750000** / 1K tokens |

### Example requests

#### Ailoot · Images

curlPython SDKNode.js SDK

```bash
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
export AILOOT_API_KEY
export AILOOT_API_KEY
: "${AILOOT_PROMPT_FILE:?Set your actual UTF-8 image brief}"
export AILOOT_PROMPT_FILE
python3 - <<'PY_REQUEST'
import json,os
from pathlib import Path
p=json.loads('{"model": "nano-banana-pro", "prompt": ""}')
f=Path(os.environ["AILOOT_PROMPT_FILE"])
if not f.is_file():raise SystemExit("Choose your actual UTF-8 brief")
p['prompt']=f.read_text(encoding="utf-8")
if not p['prompt'].strip():raise SystemExit("Brief must contain text")
Path("request.json").write_text(json.dumps(p,ensure_ascii=False))
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/images/generations \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o result.json
python3 - <<'PY_RESULT'
import base64, json, os, subprocess
from pathlib import Path
from urllib.parse import urlsplit, urljoin

def save_images(items):
    if not items: raise SystemExit("No completed images; retain the full response")
    for index, item in enumerate(items):
        encoded=item.get("b64_json")
        uri=item.get("url", "")
        if not encoded and uri.startswith("data:image/"):
            header, separator, encoded=uri.partition(",")
            if not separator or ";base64" not in header: raise SystemExit("Unsupported image data URI")
        if encoded:
            raw=base64.b64decode(encoded,validate=True)
        elif uri:
            uri=urljoin("https://api.ailoot.ai",uri)
            parsed=urlsplit(uri)
            if parsed.scheme!="https" or not parsed.netloc or parsed.username or parsed.password:
                raise SystemExit("Invalid returned image URL")
            owned=parsed.netloc=="api.ailoot.ai" and parsed.path.startswith("/v1/media/assets/") and parsed.path.endswith("/content")
            args=["curl","--fail-with-body","--silent","--show-error",uri]
            if owned: args += ["-H","Authorization: Bearer "+os.environ["AILOOT_API_KEY"]]
            temporary=Path(f"image-{index}.bin")
            subprocess.run(args+["-o",str(temporary)],check=True)
            raw=temporary.read_bytes()
            temporary.unlink()
        else: raise SystemExit("Image has neither bytes nor URL")
        if not raw: raise SystemExit("Empty image result")
        ext="png" if raw.startswith(b"\x89PNG") else "jpg" if raw.startswith(b"\xff\xd8") else "webp" if raw[:4]==b"RIFF" and raw[8:12]==b"WEBP" else "svg" if raw.lstrip().startswith((b"<svg",b"<?xml")) else "bin"
        Path(f"image-{index}.{ext}").write_bytes(raw)
    print("Every returned image saved; complete response metadata retained")
save_images(json.loads(Path("result.json").read_text())["data"])
PY_RESULT
```

```python
from openai import OpenAI
import base64, json, os, subprocess
from pathlib import Path
from urllib.parse import urlsplit, urljoin

def save_images(items):
    if not items: raise SystemExit("No completed images; retain the full response")
    for index, item in enumerate(items):
        encoded=item.get("b64_json")
        uri=item.get("url", "")
        if not encoded and uri.startswith("data:image/"):
            header, separator, encoded=uri.partition(",")
            if not separator or ";base64" not in header: raise SystemExit("Unsupported image data URI")
        if encoded:
            raw=base64.b64decode(encoded,validate=True)
        elif uri:
            uri=urljoin("https://api.ailoot.ai",uri)
            parsed=urlsplit(uri)
            if parsed.scheme!="https" or not parsed.netloc or parsed.username or parsed.password:
                raise SystemExit("Invalid returned image URL")
            owned=parsed.netloc=="api.ailoot.ai" and parsed.path.startswith("/v1/media/assets/") and parsed.path.endswith("/content")
            args=["curl","--fail-with-body","--silent","--show-error",uri]
            if owned: args += ["-H","Authorization: Bearer "+os.environ["AILOOT_API_KEY"]]
            temporary=Path(f"image-{index}.bin")
            subprocess.run(args+["-o",str(temporary)],check=True)
            raw=temporary.read_bytes()
            temporary.unlink()
        else: raise SystemExit("Image has neither bytes nor URL")
        if not raw: raise SystemExit("Empty image result")
        ext="png" if raw.startswith(b"\x89PNG") else "jpg" if raw.startswith(b"\xff\xd8") else "webp" if raw[:4]==b"RIFF" and raw[8:12]==b"WEBP" else "svg" if raw.lstrip().startswith((b"<svg",b"<?xml")) else "bin"
        Path(f"image-{index}.{ext}").write_bytes(raw)
    print("Every returned image saved; complete response metadata retained")

f=Path(os.environ["AILOOT_PROMPT_FILE"])
if not f.is_file():raise SystemExit("Set your actual UTF-8 image brief file")
request={'model': 'nano-banana-pro', 'prompt': ''}
request["prompt"]=f.read_text(encoding="utf-8")
client=OpenAI(base_url="https://api.ailoot.ai/v1",api_key=os.environ["AILOOT_API_KEY"],max_retries=0)
result=client.images.generate(**request)
Path("sdk-result.txt").write_text(str(result),encoding="utf-8")
save_images([{"b64_json":getattr(item,"b64_json",None),"url":getattr(item,"url",None)} for item in result.data])
```

```js
import OpenAI from "openai";
import { readFileSync, writeFileSync } from "node:fs";
const key=process.env.AILOOT_API_KEY;
if(!key) throw new Error("Set your actual Ailoot API key");
const client=new OpenAI({baseURL:"https://api.ailoot.ai/v1",apiKey:key,maxRetries:0});
const request={"model": "nano-banana-pro", "prompt": ""};
if(!process.env.AILOOT_PROMPT_FILE)throw new Error("Set your actual UTF-8 image brief file");
request.prompt=readFileSync(process.env.AILOOT_PROMPT_FILE,"utf8");
const result=await client.images.generate(request);
writeFileSync("sdk-result.json",JSON.stringify(result,null,2));
if(!result.data?.length) throw new Error("No completed images");
for(let index=0;index<result.data.length;index++) {
  const item=result.data[index];let encoded=item.b64_json,uri=item.url||"",raw;
  if(!encoded && uri.startsWith("data:image/")) {
    const comma=uri.indexOf(",");if(comma<0 || !uri.slice(0,comma).includes(";base64")) throw new Error("Unsupported image data URI");
    encoded=uri.slice(comma+1);
  }
  if(encoded) {
    if(encoded.length%4!==0 || !/^[A-Za-z0-9+/]*={0,2}$/.test(encoded)) throw new Error("Invalid Base64");
    raw=Buffer.from(encoded,"base64");
  } else if(uri) {
    const u=new URL(uri,"https://api.ailoot.ai");
    if(u.protocol!=="https:" || u.username || u.password) throw new Error("Invalid returned URL");
    const owned=u.origin==="https://api.ailoot.ai" && u.pathname.startsWith("/v1/media/assets/") && u.pathname.endsWith("/content");
    const response=await fetch(u,{headers:owned?{Authorization:"Bearer "+key}:{},redirect:"manual"});
    if(!response.ok) throw new Error("Image content download failed: "+response.status);
    raw=Buffer.from(await response.arrayBuffer());
  } else throw new Error("Image has neither bytes nor URL");
  if(!raw.length) throw new Error("Empty image result");
  const ext=raw.subarray(0,4).equals(Buffer.from([137,80,78,71]))?"png":raw[0]===255&&raw[1]===216?"jpg":raw.toString("ascii",0,4)==="RIFF"&&raw.toString("ascii",8,12)==="WEBP"?"webp":raw.toString("utf8").trimStart().startsWith("<svg")||raw.toString("utf8").trimStart().startsWith("<?xml")?"svg":"bin";
  writeFileSync(`image-${index}.${ext}`,raw);
}
console.log("Every returned image saved; sdk-result.json retains complete metadata");
```

### Receive and save results

#### Ailoot · Images

Download each returned image or save its Base64 contents

- `GET /v1/media/tasks/{task_id}`
- `GET /v1/media/assets/{asset_id}/content`
- `GET /v1/media/assets`
- `GET /v1/media/assets/{asset_id}`

##### Keep all completed results

Save every completed image; retrieve each returned URL or decode its Base64 contents.

Save every data item. Decode each b64\_json or fetch every returned signed URL. Select a filename extension from the actual MIME/bytes.

##### If the original response needs checking

If an image generation or edit result requires a check, keep the original operation\_id/X-Client-Request-ID and returned result information. Recover existing owned results through the media library using actual task\_id or asset\_id values. Do not resubmit the generation/edit request or construct a polling URL from operation\_id.

Response fields

| Field | Type |
| --- | --- |
| Field`created` | Typeinteger |
| Field`data[].url` | Typestring |
| Field`data[].b64_json` | Typebase64 string |
| Field`usage` | Typeobject |

Errors and next steps

| Response | Condition | Next step |
| --- | --- | --- |
| Response400 · `invalid_request_error` | ConditionInvalid required fields, material representation or parameter value | Next stepCorrect the indicated fields before a new creation request. |
| Response`server_error` | ConditionThe returned response says the operation or result requires a check | Next stepKeep the original returned operation/task ID, request headers and response; continue supported reads of that original operation. Do not resubmit the creation request. |

### Aliases

#### Model aliases

<strong>Ailoot</strong> [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image&fmt=images), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview&fmt=images), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro&fmt=images)
**Ailoot Ultra** [`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=images)

#### Method path aliases

`/v1/images`

#### Related caller IDs

[`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=images), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview&fmt=images), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro&fmt=images), [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image&fmt=images)

**Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions` `google/gemini-3-pro-image`

[`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=chat)

Google /`google/gemini-3-pro-image`

### Overview

Nano Banana Pro (Gemini 3 Pro Image) is Google’s reasoning-driven image model for complex design, product mockups and factual visualisations. It accepts text and image references and generates images with text, with 1K–4K output and detailed creative control.

Accepted inputs

Text

Results

Text

### Available in Ailoot · inputs & methods

**Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions`

Input types

`text`

Output types

`text`

Output format

json or SSE

| Field | Type | Requirement | Values & limits | Default |
| --- | --- | --- | --- | --- |
| Field`model` | Type`string` | RequirementRequired | Values & limits google/gemini-3-pro-image | Default— |
| Field`messages` | Type`message[]` | RequirementRequired | Values & limits Minimum items: 1 | Default— |
| Field`messages[].role` | Type`string` | RequirementRequired | Values & limits Examples: system, user, assistant, tool, function Conditions: These roles are explicitly represented by Source compatibility types; the exact model role set remains model-specific. Model-specific | Default— |
| Field`messages[].content` | Type`string\|content_part[]\|null` | RequirementOptional | Values & limits | Default— |
| Field`messages[].tool_calls` | Type`tool_call[]` | RequirementOptional | Values & limits | Default— |
| Field`messages[].tool_call_id` | Type`string` | RequirementOptional | Values & limits Applies when: role=tool; use actual returned ID | Default— |
| Field`messages[].name` | Type`string` | RequirementOptional | Values & limits | Default— |
| Field`messages[].reasoning_content` | Type`string` | RequirementOptional | Values & limits Applies when: Round-trip actual returned reasoning where this model uses it | Default— |
| Field`messages[].reasoning_details` | Type`object\|array` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`max_tokens` | Type`integer` | RequirementOptional | Values & limits Minimum: 1 Model-specific | Default— |
| Field`max_completion_tokens` | Type`integer` | RequirementOptional | Values & limits Minimum: 1 Model-specific | Default— |
| Field`stream` | Type`boolean` | RequirementOptional | Values & limits | Defaultfalse |
| Field`stream_options.include_usage` | Type`boolean` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`temperature` | Type`number` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`top_p` | Type`number` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`stop` | Type`string\|string[]` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`tools` | Type`function_tool[]` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`tools[].type` | Type`string` | RequirementOptional | Values & limits function Model-specific | Default— |
| Field`tools[].function.name` | Type`string` | RequirementRequired | Values & limits Applies when: function tool supplied | Default— |
| Field`tools[].function.description` | Type`string` | RequirementOptional | Values & limits | Default— |
| Field`tools[].function.parameters` | Type`JSON_schema` | RequirementOptional | Values & limits | Default— |
| Field`tool_choice` | Type`string\|object` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`parallel_tool_calls` | Type`boolean` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`response_format` | Type`object` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`reasoning_effort` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`reasoning` | Type`object` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`service_tier` | Type`string` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`instructions` | Type`string` | RequirementOptional | Values & limits Compatibility field | Default— |
| Field`functions` | Type`function[]` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`function_call` | Type`string\|object` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`prompt_cache_options` | Type`object` | RequirementOptional | Values & limits Model-specific | Default— |
| Field`modalities` | Type`string[]` | RequirementOptional | Values & limits text | Default— |
| Field`provider` | Type`object` | RequirementOptional | Values & limits Conditions: provider.options is rejected on this Ultra text route | Default— |
| Field`cache_control.ttl` | Type`string` | RequirementOptional | Values & limits Conditions: 1h is rejected in actual prompt-cache locations | Default— |

Input material combinations

**Text** · UTF8 text

`messages[].content`

Method parameters and lifecycle

| Parameter | Contract |
| --- | --- |
| Parameter`content_type` | Contractapplication/json |
| Parameter`required` | Contractmodel, messages |
| Parameter`material_types` | Contracttext |
| Parameter`messages` | Contractmessage array with role/content shape |
| Parameter`file_material` | Contractactual UTF-8 document inserted as literal text; no file ID inferred |
| Parameter`optional_controls` | Contractstream, temperature, top\_p, stop, max\_tokens, max\_completion\_tokens, reasoning, response\_format, tools, tool\_choice |
| Parameter`control_scope` | Contractmodel-specific; user function tools differ from hosted tools |
| Parameter`output_modalities` | Contracttext |
| Parameter`hosted_operations` | Contractfalse |
| Parameter`multimodal_input_binding` | Contractnull |

Lifecycle: `synchronous_or_streamed`

Send exact model ID with messages.

Context length is not an output cap.

A text file may supply literal text; image/audio/file-object inputs need exact binding.

### Pricing

Tariff references do not add request options. Supported parameters are listed for the selected method.

Fast mode

Standard rate When fast mode is selected

Flex mode

Standard rate When flex mode is selected

Maximum reasoning effort

Standard rate When maximum reasoning effort uses the default adjustment

Explicit cache pricing

Not enabled When explicit cache is requested

#### Ailoot rates

#### Prices by configuration

Match each charge to the conditions shown. Use one rate for each set of alternative configurations.

| Configuration | Rate schedule | Context tokens, more than | Context tokens, up to and including | Charge |
| --- | --- | --- | --- | --- |
| ConfigurationBase token rates | Rate scheduleBase rate | Context tokens, more than— | Context tokens, up to and includingNo upper bound | Charge Input · Input tokens **$0.004** / 1K tokens Output · Output tokens **$0.024** / 1K tokens Input · Cache read **$0.0004** / 1K tokens Input · Cache write **$0.00075** / 1K tokens Input · Cache write, 1 hour **—** / 1K tokens Output · Image output tokens **$0.24** / 1K image tokens |
| ConfigurationRequest-length tier 1 | Rate schedule— | Context tokens, more than0 | Context tokens, up to and includingNo upper bound | Charge Input · Input tokens **$0.004** / 1K tokens Output · Output tokens **$0.024** / 1K tokens Input · Cache read **$0.0004** / 1K tokens Input · Cache write **$0.00075** / 1K tokens Input · Cache write, 1 hour **—** / 1K tokens |

#### Reference tariff details

Model-level reference schedules do not change method selection, quotes or charges. Active charges use the selected Ailoot method rates.

Google: Nano Banana Pro (Gemini 3 Pro Image)

#### Prices by configuration

| Configuration | Billing conditions | Charge |
| --- | --- | --- |
| ConfigurationGoogle: Nano Banana Pro (Gemini 3 Pro Image) · Default configuration | Billing conditionsDefault configuration | Charge Input · Input tokens **$0.004** / 1K tokens Output · Output tokens **$0.024** / 1K tokens Input · Input image **$0.004** / 1K tokens Output · Output image **$0.24** / 1K tokens Input · Audio input **$0.004** / 1K tokens Input · Audio cache read **$0.0004** / 1K tokens Output · Web search **$0.028** per search Output · Reasoning tokens **$0.024** / 1K tokens Input · Cache read **$0.0004** / 1K tokens Input · Cache write · 5 minutes **$0.00075** / 1K tokens |

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/)

### Example requests

#### Ailoot Ultra · OpenAI Chat

curlPython SDKPython stream

```bash
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
python3 - <<'PY_REQUEST'
import json,os
from pathlib import Path
p=json.loads('{"model": "google/gemini-3-pro-image", "messages": [{"role": "user", "content": "Explain the difference between an observation and a hypothesis in three sentences."}]}')

Path("request.json").write_text(json.dumps(p,ensure_ascii=False))
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/chat/completions \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o result.json
python3 - <<'PY_RESULT'
import json
from pathlib import Path
r=json.loads(Path("result.json").read_text())
for x in r.get("choices",[]):
    if x.get("message",{}).get("content"): print(x["message"]["content"])
PY_RESULT
```

```python
from openai import OpenAI
import os

if not os.environ.get("AILOOT_API_KEY", "").strip(): raise SystemExit("Set AILOOT_API_KEY before making a request")
client=OpenAI(base_url="https://api.ailoot.ai/v1",api_key=os.environ["AILOOT_API_KEY"],max_retries=0)
result=client.chat.completions.create(model='google/gemini-3-pro-image',messages=[{"role":"user","content":"Explain observations and hypotheses in three sentences."}])
import base64, json
from pathlib import Path

def save_result(data, stem="result"):
    # Keep every field, including usage, IDs, reasoning and tool requests.
    Path(stem + ".json").write_text(json.dumps(data, ensure_ascii=False, indent=2), encoding="utf-8")
    print(json.dumps(data, ensure_ascii=False, indent=2))
    def save_blob(encoded, suffix, label):
        raw = base64.b64decode(encoded, altchars=b"-_", validate=True)
        ext = "png" if raw.startswith(b"\x89PNG\r\n\x1a\n") else "jpg" if raw.startswith(b"\xff\xd8") else "webp" if raw[:4] == b"RIFF" and raw[8:12] == b"WEBP" else suffix
        file = Path(stem + "-" + label + "." + ext)
        file.write_bytes(raw)
        print("Saved", file)
    for index, block in enumerate(data.get("content") or []):
        print("Content", index, json.dumps(block, ensure_ascii=False))
    for choice in data.get("choices") or []:
        print("Choice", choice.get("index"), json.dumps(choice.get("message", choice.get("delta", {})), ensure_ascii=False))
    for index, item in enumerate(data.get("output") or []):
        print("Output", index, json.dumps(item, ensure_ascii=False))
        if item.get("type") == "image_generation_call" and item.get("result"):
            save_blob(item["result"], item.get("output_format") or "bin", "output-" + str(index))
    for ci, candidate in enumerate(data.get("candidates") or []):
        for pi, part in enumerate((candidate.get("content") or {}).get("parts") or []):
            print("Candidate/part", ci, pi, json.dumps(part, ensure_ascii=False))
            blob = part.get("inlineData") or part.get("inline_data")
            if blob and blob.get("data"):
                mime = blob.get("mimeType") or blob.get("mime_type")
                suffix = {"image/png":"png", "image/jpeg":"jpg", "image/webp":"webp", "audio/wav":"wav", "audio/mpeg":"mp3", "video/mp4":"mp4"}.get(mime, "bin")
                save_blob(blob["data"], suffix, "candidate-" + str(ci) + "-part-" + str(pi))

save_result(result.to_dict(mode="json"))
```

```python
from openai import OpenAI
import os
from pathlib import Path

if not os.environ.get("AILOOT_API_KEY", "").strip(): raise SystemExit("Set AILOOT_API_KEY before making a request")
client=OpenAI(base_url="https://api.ailoot.ai/v1",api_key=os.environ["AILOOT_API_KEY"],max_retries=0)
import base64, json
from pathlib import Path

def save_result(data, stem="result"):
    # Keep every field, including usage, IDs, reasoning and tool requests.
    Path(stem + ".json").write_text(json.dumps(data, ensure_ascii=False, indent=2), encoding="utf-8")
    print(json.dumps(data, ensure_ascii=False, indent=2))
    def save_blob(encoded, suffix, label):
        raw = base64.b64decode(encoded, altchars=b"-_", validate=True)
        ext = "png" if raw.startswith(b"\x89PNG\r\n\x1a\n") else "jpg" if raw.startswith(b"\xff\xd8") else "webp" if raw[:4] == b"RIFF" and raw[8:12] == b"WEBP" else suffix
        file = Path(stem + "-" + label + "." + ext)
        file.write_bytes(raw)
        print("Saved", file)
    for index, block in enumerate(data.get("content") or []):
        print("Content", index, json.dumps(block, ensure_ascii=False))
    for choice in data.get("choices") or []:
        print("Choice", choice.get("index"), json.dumps(choice.get("message", choice.get("delta", {})), ensure_ascii=False))
    for index, item in enumerate(data.get("output") or []):
        print("Output", index, json.dumps(item, ensure_ascii=False))
        if item.get("type") == "image_generation_call" and item.get("result"):
            save_blob(item["result"], item.get("output_format") or "bin", "output-" + str(index))
    for ci, candidate in enumerate(data.get("candidates") or []):
        for pi, part in enumerate((candidate.get("content") or {}).get("parts") or []):
            print("Candidate/part", ci, pi, json.dumps(part, ensure_ascii=False))
            blob = part.get("inlineData") or part.get("inline_data")
            if blob and blob.get("data"):
                mime = blob.get("mimeType") or blob.get("mime_type")
                suffix = {"image/png":"png", "image/jpeg":"jpg", "image/webp":"webp", "audio/wav":"wav", "audio/mpeg":"mp3", "video/mp4":"mp4"}.get(mime, "bin")
                save_blob(blob["data"], suffix, "candidate-" + str(ci) + "-part-" + str(pi))

with client.chat.completions.stream(model='google/gemini-3-pro-image',messages=[{"role":"user","content":"Explain observations and hypotheses in three sentences."}]) as stream:
    with Path("stream-events.jsonl").open("w",encoding="utf-8") as log:
        for event in stream:
            payload=event.to_dict(mode="json")
            log.write(json.dumps(payload,ensure_ascii=False)+"\n"); log.flush()
            print(json.dumps(payload,ensure_ascii=False))
    final=stream.get_final_completion()
    save_result(final.to_dict(mode="json"),"stream-result")
```

### Receive and save results

#### Ailoot Ultra · OpenAI Chat

json or SSE

##### Keep all completed results

Keep every complete returned response, file and content part.

Keep every choice and its content/tool calls/reasoning. In SSE assemble deltas by choice/tool index, retain the final finish reason and usage.

##### If the original response needs checking

Keep request/response IDs and headers. No generic text job retrieval URL is supplied.

Response fields

| Field | Type |
| --- | --- |
| Field`choices[].index` | Typeinteger |
| Field`choices[].message.content` | Typestring\|null |
| Field`choices[].message.tool_calls` | Typetool\_call\[\] |
| Field`choices[].message.reasoning_content` | Typestring |
| Field`choices[].message.reasoning_details` | Typeobject\|array |
| Field`choices[].finish_reason` | Typestring\|null |
| Field`usage` | Typeobject |

Errors and next steps

| Response | Condition | Next step |
| --- | --- | --- |
| Response400 · `invalid_request_error` | ConditionInvalid required fields, material representation or parameter value | Next stepCorrect the indicated fields before a new creation request. |

### Aliases

#### Model aliases

<strong>Ailoot</strong> [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro)
**Ailoot Ultra** [`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=chat)

#### Method path aliases

`/v1/images`

#### Related caller IDs

[`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=chat), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro), [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image)

**Ailoot Ultra · Images** `POST /v1/images/generations` `google/gemini-3-pro-image`

[`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=images)

Google /`google/gemini-3-pro-image`

### Overview

Nano Banana Pro (Gemini 3 Pro Image) is Google’s reasoning-driven image model for complex design, product mockups and factual visualisations. It accepts text and image references and generates images with text, with 1K–4K output and detailed creative control.

Accepted inputs

Text · Images

Results

Images

### Available in Ailoot · inputs & methods

**Ailoot Ultra · Images** `POST /v1/images/generations`

Input types

`text`, `image`

Output types

`image`

| Field | Type | Requirement | Values & limits | Default |
| --- | --- | --- | --- | --- |
| Field`model` | Type`string` | RequirementRequired | Values & limits google/gemini-3-pro-image | Default— |
| Field`prompt` | Type`string` | RequirementRequired | Values & limits Minimum length: 1 | Default— |
| Field`resolution` | Type`string` | RequirementOptional | Values & limits 1K, 2K, 4K | Default— |
| Field`aspect_ratio` | Type`string` | RequirementOptional | Values & limits 1:1, 2:3, 3:2, 3:4, 4:3, 4:5, 5:4, 9:16, 16:9, 21:9 | Default— |
| Field`n` | Type`integer` | RequirementOptional | Values & limits Minimum: 1 Maximum: 1 | Default— |
| Field`input_references` | Type`array` | RequirementOptional | Values & limits Minimum items: 0 Maximum items: 14 | Default— |
| Field`provider` | Type`object` | RequirementOptional | Values & limits | Default— |

Method parameters and lifecycle

| Parameter | Contract |
| --- | --- |
| Parameter`content_type` | Contractapplication/json |
| Parameter`required` | Contractmodel, prompt |
| Parameter`material_types` | Contracttext, image |

Lifecycle: `synchronous_result_then_owned_library`

`GET /v1/media/tasks/{task_id}` · actual returned task\_id or media library record

`GET /v1/media/assets/{asset_id}/content`

`GET /v1/media/assets`

`GET /v1/media/assets/{asset_id}`

### Pricing

##### How the final charge is calculated

The displayed rates estimate the cost before generation. The final charge is calculated from the cost recorded for the original generation. Measured output duration and forecast quantities are not the final billable quantity.

Tariff references do not add request options. Supported parameters are listed for the selected method.

Fast mode

Not specified When fast mode is selected

Flex mode

Not specified When flex mode is selected

Maximum reasoning effort

Not specified When maximum reasoning effort uses the default adjustment

#### Estimated rates for comparison

#### Prices by configuration

Match each charge to the conditions shown. Use one rate for each set of alternative configurations.

| Configuration | Rate schedule | Forecast quantity | Charge |
| --- | --- | --- | --- |
| ConfigurationBase token rates | Rate scheduleBase rate | Forecast quantity— | Charge Input · Input tokens · Estimate for comparison only **—** / 1K tokens Output · Output tokens · Estimate for comparison only **—** / 1K tokens Input · Cache read · Estimate for comparison only **—** / 1K tokens Input · Cache write · Estimate for comparison only **—** / 1K tokens Input · Cache write, 1 hour · Estimate for comparison only **—** / 1K tokens |
| ConfigurationEstimated generation cost | Rate schedule— | Forecast quantityone generation estimate | Charge Output · Estimated generation cost · Estimate for comparison only **$0.98304** estimate before generation This estimate is not an additional charge or a fixed rate for the completed generation. |

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/)

### Example requests

#### Ailoot Ultra · Images

curl

```bash
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
export AILOOT_API_KEY
python3 - <<'PY_REQUEST'
import json,os
from pathlib import Path
p={'model': 'google/gemini-3-pro-image', 'prompt': 'a red panda astronaut floating in space, studio lighting'}

Path("request.json").write_text(json.dumps(p,ensure_ascii=False))
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/images/generations \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o result.json
python3 - <<'PY_RESULT'
import base64, json, os, subprocess
from pathlib import Path
from urllib.parse import urlsplit, urljoin

def save_images(items):
    if not items: raise SystemExit("No completed images; retain the full response")
    for index, item in enumerate(items):
        encoded=item.get("b64_json")
        uri=item.get("url", "")
        if not encoded and uri.startswith("data:image/"):
            header, separator, encoded=uri.partition(",")
            if not separator or ";base64" not in header: raise SystemExit("Unsupported image data URI")
        if encoded:
            raw=base64.b64decode(encoded,validate=True)
        elif uri:
            uri=urljoin("https://api.ailoot.ai",uri)
            parsed=urlsplit(uri)
            if parsed.scheme!="https" or not parsed.netloc or parsed.username or parsed.password:
                raise SystemExit("Invalid returned image URL")
            owned=parsed.netloc=="api.ailoot.ai" and parsed.path.startswith("/v1/media/assets/") and parsed.path.endswith("/content")
            args=["curl","--fail-with-body","--silent","--show-error",uri]
            if owned: args += ["-H","Authorization: Bearer "+os.environ["AILOOT_API_KEY"]]
            temporary=Path(f"image-{index}.bin")
            subprocess.run(args+["-o",str(temporary)],check=True)
            raw=temporary.read_bytes()
            temporary.unlink()
        else: raise SystemExit("Image has neither bytes nor URL")
        if not raw: raise SystemExit("Empty image result")
        ext="png" if raw.startswith(b"\x89PNG") else "jpg" if raw.startswith(b"\xff\xd8") else "webp" if raw[:4]==b"RIFF" and raw[8:12]==b"WEBP" else "svg" if raw.lstrip().startswith((b"<svg",b"<?xml")) else "bin"
        Path(f"image-{index}.{ext}").write_bytes(raw)
    print("Every returned image saved; complete response metadata retained")
save_images(json.loads(Path("result.json").read_text())["data"])
PY_RESULT
```

### Receive and save results

#### Ailoot Ultra · Images

Download each returned image or save its Base64 contents

- `GET /v1/media/tasks/{task_id}`
- `GET /v1/media/assets/{asset_id}/content`
- `GET /v1/media/assets`
- `GET /v1/media/assets/{asset_id}`

Other content reads

Read existing owned assets

```bash
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/media/assets \
  -H "Authorization: Bearer $AILOOT_API_KEY" -o owned-assets.json
# Preserve every returned asset and follow its exact signed content URL. Do not construct a signed token.
```

##### Keep all completed results

Save every completed image; retrieve each returned URL or decode its Base64 contents.

Retain the complete response and headers, every actual output, original returned identifiers and all usage fields. Recover the original operation without submitting creation again.

##### If the original response needs checking

Keep the returned X-Client-Request-ID for reconciliation. Read only actual returned task\_id/asset\_id values or the owned media library; never build a task URL from the operation ID and never resubmit creation.

Response fields

| Field | Type |
| --- | --- |
| Field`created` | Type |
| Field`data[].url` | Type |
| Field`data[].b64_json` | Type |
| Field`usage` | Type |

### Aliases

#### Model aliases

<strong>Ailoot</strong> [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image&fmt=images), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview&fmt=images), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro&fmt=images)
**Ailoot Ultra** [`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=images)

#### Method path aliases

`/v1/images`

#### Related caller IDs

[`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=images), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview&fmt=images), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro&fmt=images), [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image&fmt=images)

**Ailoot Ultra · Anthropic Messages** `POST /v1/messages` `google/gemini-3-pro-image`

[`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=messages)

Google /`google/gemini-3-pro-image`

### Overview

Nano Banana Pro (Gemini 3 Pro Image) is Google’s reasoning-driven image model for complex design, product mockups and factual visualisations. It accepts text and image references and generates images with text, with 1K–4K output and detailed creative control.

Accepted inputs

Text

Results

json · sse

### Available in Ailoot · inputs & methods

**Ailoot Ultra · Anthropic Messages** `POST /v1/messages`

Input types

`text`

Output types

`json`, `sse`

Output format

JSON or SSE

| Field | Type | Requirement | Values & limits | Default |
| --- | --- | --- | --- | --- |
| Field`model` | Type`string` | RequirementRequired | Values & limits google/gemini-3-pro-image | Default— |
| Field`messages` | Type`message[]` | RequirementRequired | Values & limits | Default— |
| Field`messages[].role` | Type`string` | RequirementRequired | Values & limits user, assistant | Default— |
| Field`messages[].content` | Type`string` | RequirementRequired | Values & limits | Default— |
| Field`max_tokens` | Type`integer` | RequirementRequired | Values & limits | Default— |
| Field`stream` | Type`boolean` | RequirementOptional | Values & limits | Defaultfalse |

Input material combinations

**Text** · UTF-8 text

`messages[].content string`

Method parameters and lifecycle

| Parameter | Contract |
| --- | --- |
| Parameter`content_type` | Contractapplication/json |
| Parameter`required` | Contractmodel, messages, max\_tokens |
| Parameter`optional_controls` | Contractstream |
| Parameter`material_types` | Contracttext |
| Parameter`text_file_material` | ContractRead the actual UTF-8 document and put its text in the indicated input or message content string. |

Lifecycle: `synchronous_or_streamed`

### Pricing

Tariff references do not add request options. Supported parameters are listed for the selected method.

Fast mode

Standard rate When fast mode is selected

Flex mode

Standard rate When flex mode is selected

Maximum reasoning effort

Standard rate When maximum reasoning effort uses the default adjustment

Explicit cache pricing

Not enabled When explicit cache is requested

#### Ailoot rates

#### Prices by configuration

Match each charge to the conditions shown. Use one rate for each set of alternative configurations.

| Configuration | Rate schedule | Context tokens, more than | Context tokens, up to and including | Charge |
| --- | --- | --- | --- | --- |
| ConfigurationBase token rates | Rate scheduleBase rate | Context tokens, more than— | Context tokens, up to and includingNo upper bound | Charge Input · Input tokens **$0.004** / 1K tokens Output · Output tokens **$0.024** / 1K tokens Input · Cache read **$0.0004** / 1K tokens Input · Cache write **$0.00075** / 1K tokens Input · Cache write, 1 hour **—** / 1K tokens Output · Image output tokens **$0.24** / 1K image tokens |
| ConfigurationRequest-length tier 1 | Rate schedule— | Context tokens, more than0 | Context tokens, up to and includingNo upper bound | Charge Input · Input tokens **$0.004** / 1K tokens Output · Output tokens **$0.024** / 1K tokens Input · Cache read **$0.0004** / 1K tokens Input · Cache write **$0.00075** / 1K tokens Input · Cache write, 1 hour **—** / 1K tokens |

Ailoot reserves an estimated amount before a request. After the result, it settles the final charge from measured usage. Streaming settlement uses the final usage record. [How reservation and settlement work →](https://ailoot.ai/docs/en/billing/reserve/)

### Example requests

#### Ailoot Ultra · Anthropic Messages

Complete minimal JSON bodycurl · use your UTF-8 documentPython · save the complete result

```json
{
  "model": "google/gemini-3-pro-image",
  "max_tokens": 128,
  "messages": [
    {
      "role": "user",
      "content": "Summarize the incident report."
    }
  ],
  "stream": false
}
```

```bash
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
: "${AILOOT_TEXT_FILE:?Set your actual UTF-8 document}"
export AILOOT_TEXT_FILE
python3 - <<'PY_REQUEST'
import json, os
from pathlib import Path

source_file = Path(os.environ['AILOOT_TEXT_FILE'])
if not source_file.is_file():
    raise SystemExit('Set AILOOT_TEXT_FILE to your actual UTF-8 document')
text = source_file.read_text(encoding='utf-8')
if not text.strip():
    raise SystemExit('Choose a document containing text')
payload = {'model': 'google/gemini-3-pro-image', 'max_tokens': 128, 'messages': [{'role': 'user', 'content': 'Summarize the incident report.'}]}
payload['messages'][0]['content'] = 'Summarize this material and quote supporting source passages.\n\n' + text
Path('request.json').write_text(json.dumps(payload, ensure_ascii=False), encoding='utf-8')
PY_REQUEST
curl --fail-with-body --silent --show-error https://api.ailoot.ai/v1/messages \
  -H "x-api-key: $AILOOT_API_KEY" -H 'anthropic-version: 2023-06-01' -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o result.json
python3 - <<'PY_RESULT'
import json
from pathlib import Path

result = json.loads(Path('result.json').read_text(encoding='utf-8'))
print(json.dumps(result, ensure_ascii=False, indent=2))
PY_RESULT
```

```python
import json, os
from pathlib import Path

source_file = Path(os.environ['AILOOT_TEXT_FILE'])
if not source_file.is_file():
    raise SystemExit('Set AILOOT_TEXT_FILE to your actual UTF-8 document')
text = source_file.read_text(encoding='utf-8')
if not text.strip():
    raise SystemExit('Choose a document containing text')
payload = {'model': 'google/gemini-3-pro-image', 'max_tokens': 128, 'messages': [{'role': 'user', 'content': 'Summarize the incident report.'}]}
payload['messages'][0]['content'] = 'Summarize this material and quote supporting source passages.\n\n' + text
from urllib.request import Request, urlopen
from urllib.error import HTTPError

api_key = os.environ['AILOOT_API_KEY']
if not api_key.strip():
    raise SystemExit('Set AILOOT_API_KEY before making a request')
headers = {'x-api-key': 'PLACEHOLDER_KEY', 'anthropic-version': '2023-06-01', 'Content-Type': 'application/json'}
headers['x-api-key'] = api_key
request = Request('https://api.ailoot.ai/v1/messages', data=json.dumps(payload, ensure_ascii=False).encode('utf-8'), headers=headers, method='POST')
try:
    with urlopen(request, timeout=120) as response:
        raw = response.read()
        Path('response-headers.txt').write_text(str(response.headers), encoding='utf-8')
except HTTPError as error:
    Path('result.json').write_bytes(error.read())
    Path('response-headers.txt').write_text(str(error.headers), encoding='utf-8')
    raise
Path('result.json').write_bytes(raw)
import json
from pathlib import Path

result = json.loads(Path('result.json').read_text(encoding='utf-8'))
print(json.dumps(result, ensure_ascii=False, indent=2))
```

### Receive and save results

#### Ailoot Ultra · Anthropic Messages

JSON or SSE

##### Keep all completed results

Keep every complete returned response, file and content part.

Keep all content blocks, thinking signatures and actual tool-use IDs. Assemble all SSE block deltas; a first text block is not the complete output.

##### If the original response needs checking

Keep request/response IDs and headers. No generic text job retrieval URL is supplied.

Response fields

| Field | Type |
| --- | --- |
| Field`id` | Typestring |
| Field`model` | Typestring |
| Field`content[]` | Typetext\|thinking\|tool\_use\|other content block |
| Field`stop_reason` | Typestring\|null |
| Field`usage` | Typeobject |

Errors and next steps

| Response | Condition | Next step |
| --- | --- | --- |
| Response400 · `invalid_request_error` | ConditionInvalid required fields, material representation or parameter value | Next stepCorrect the indicated fields before a new creation request. |

### Aliases

#### Model aliases

<strong>Ailoot</strong> [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro)
**Ailoot Ultra** [`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=messages)

#### Method path aliases

`/v1/images`

#### Related caller IDs

[`google/gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Ultra&caller=google%2Fgemini-3-pro-image&fmt=messages), [`gemini-3-pro-image-preview`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image-preview), [`nano-banana-pro`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=nano-banana-pro), [`gemini-3-pro-image`](https://ailoot.ai/models/en/#m=google%2Fgemini-3-pro-image&route=Core&caller=gemini-3-pro-image)

FAQ · Google: Nano Banana Pro (Gemini 3 Pro Image)

What inputs and results are available?

`POST /v1/images/generations` · `gemini-3-pro-image`: `text` → `image` `POST /v1/images/generations` · `gemini-3-pro-image-preview`: `text` → `image` `POST /v1/images/generations` · `nano-banana-pro`: `text` → `image` `POST /v1/chat/completions` · `google/gemini-3-pro-image`: `text` → `text` `POST /v1/images/generations` · `google/gemini-3-pro-image`: `text`, `image` → `image` `POST /v1/messages` · `google/gemini-3-pro-image`: `text` → `json`, `sse`

Which fields does the request use?

`POST /v1/images/generations` · `gemini-3-pro-image`: `model`, `prompt`, `n`, `response_format`, `stream` `POST /v1/images/generations` · `gemini-3-pro-image-preview`: `model`, `prompt`, `n`, `response_format`, `stream` `POST /v1/images/generations` · `nano-banana-pro`: `model`, `prompt`, `n`, `response_format`, `stream` `POST /v1/chat/completions` · `google/gemini-3-pro-image`: `model`, `messages`, `stream`, `modalities`, `provider` `POST /v1/images/generations` · `google/gemini-3-pro-image`: `model`, `prompt`, `resolution`, `aspect_ratio`, `n`, `input_references`, `provider` `POST /v1/messages` · `google/gemini-3-pro-image`: `model`, `messages`, `max_tokens`, `stream`

What limits apply?

`POST /v1/images/generations` · `gemini-3-pro-image`: `ctx`: `65536`; `max_out`: `32768`; `n.minimum`: `1` `POST /v1/images/generations` · `gemini-3-pro-image-preview`: `ctx`: `65536`; `max_out`: `32768`; `n.minimum`: `1` `POST /v1/images/generations` · `nano-banana-pro`: `ctx`: `65536`; `max_out`: `32768`; `n.minimum`: `1` `POST /v1/chat/completions` · `google/gemini-3-pro-image`: `messages.min_items`: `1` `POST /v1/images/generations` · `google/gemini-3-pro-image`: `n.minimum`: `1`; `n.maximum`: `1`

Connect Ailoot to Claude Code, OpenCode, Hermes or your own app.

## The company and its project portfolio

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Enter your code at checkout. The price updates to reflect the current promotion.

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## Ailoot · The company and its project portfolio





Ailoot combines established operating experience, a large client base, stable service and ongoing KPI control.





The company and its project portfolio: millions of customers; monthly sales in the billions.





Ailoot brings that operating experience to API access for AI features in customer products, agents, applications and automations.