Source: https://ailoot.ai/models/en/pika-21/
Canonical: https://ailoot.ai/models/en/pika-21/
Language: en

# Pika 2.1

[Markdown](https://ailoot.ai/models/en/pika-21/index.md) · [JSON](https://ailoot.ai/models/en/pika-21/facts.json)

## [Pika 2.1](https://ailoot.ai/models/en/pika-21/)

Pika 2.1 creates a video from a prompt with optional image guidance. Describe the shot and source roles, then retrieve the original operation’s completed video through Ailoot.

- [**Ailoot Ultra · Video** `POST /v1/videos` `pika-21`](https://ailoot.ai/models/en/pika-21/#method-0)

About the model

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

Select pika-21 with model and prompt in /v1/videos. The request accepts image as a string or an array of up to ten strings and also exposes negative\_prompt. Use the prompt to describe the subject, setting, visible action and camera direction.

For a text-led scene, establish the composition before adding motion. For an image-guided clip, explain what the supplied material contributes and which subject details should remain recognisable. Keep one clear action and end state in the brief so a later variation can target a specific change. Retain the source material and selected prompt with the result.

Submit the shot once through /v1/videos, retain the returned request ID and poll that original operation through /v1/videos/{request\_id}. Save every completed video output and the complete response before reviewing the action, framing and end state against the brief.

**Ailoot Ultra · Video** `POST /v1/videos` `pika-21`

[`pika-21`](https://ailoot.ai/models/en/#m=pika-21&route=Ultra&caller=pika-21&fmt=videos)

Other /`pika-21`

### Overview

Pika 2.1 creates a video from a prompt with optional image guidance. Describe the shot and source roles, then retrieve the original operation’s completed video through Ailoot.

Accepted inputs

Text · Images

Results

Video

### Available in Ailoot · inputs & methods

**Ailoot Ultra · Video** `POST /v1/videos`

Input types

`text`, `image`

Output types

`video`

| Field | Type | Requirement | Values & limits | Default |
| --- | --- | --- | --- | --- |
| Field`model` | Type`string` | RequirementRequired | Values & limits pika-21 Conditions: Use this exact Ailoot routing selector. | Default— |
| Field`image` | Type`string or array<string>` | RequirementOptional | Values & limits Conditions: Use the selected-model documented field and listed choices; omit an unspecified optional value. | Default— |
| Field`prompt` | Type`string` | RequirementRequired | Values & limits Conditions: Use the selected-model documented field and listed choices; omit an unspecified optional value. | Default— |
| Field`negative_prompt` | Type`string` | RequirementOptional | Values & limits Conditions: Use the selected-model documented field and listed choices; omit an unspecified optional value. | Default— |

Method parameters and lifecycle

| Parameter | Contract |
| --- | --- |
| Parameter`content_type` | Contractapplication/json |
| Parameter`required` | Contractmodel, prompt |
| Parameter`optional` | Contractimage, negative\_prompt |
| Parameter`material_types` | Contracttext, image |
| Parameter`conditions` | ContractUse this exact Ailoot routing selector., Use the selected-model documented field and listed choices; omit an unspecified optional value., Use the selected-model documented field and listed choices; omit an unspecified optional value., Use the selected-model documented field and listed choices; omit an unspecified optional value. |

Method aliases: `/v1/videos/generations`

Lifecycle: `submit_once_poll_original`

`GET /v1/videos/{request_id}`

`GET /v1/videos/generations/{request_id}`

`GET /v1/videos/{request_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 | Billing quantity | Charge |
| --- | --- | --- | --- | --- |
| ConfigurationBase token rates | Rate scheduleBase rate | Forecast quantity— | Billing 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 |
| ConfigurationPer request | Rate schedule— | Forecast quantity— | Billing quantityone request | Charge Input · Estimate for comparison only **$1.2** per request |
| ConfigurationEstimated generation cost | Rate schedule— | Forecast quantityone generation estimate | Billing quantity— | Charge Output · Estimated generation cost · Estimate for comparison only **$1.2** 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 · Video

curl · create once and retain the complete resultRead the original taskSave every completed owned asset

```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=json.loads('{"model": "pika-21", "prompt": "A cat is walking on grass."}')

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/videos \
  -H "Authorization: Bearer $AILOOT_API_KEY" -H 'Content-Type: application/json' \
  --data-binary @request.json -D response-headers.txt -o result.json
# Submit once. Retain the complete result, original identifiers and every response header.
```

```bash
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
export AILOOT_API_KEY
python3 - <<'PY_STATUS'
import json,os,subprocess
from pathlib import Path
from urllib.parse import urljoin,urlsplit
r=json.loads(Path("result.json").read_text())
u=urljoin("https://api.ailoot.ai",r["polling_url"])
p=urlsplit(u)
if p.scheme!="https" or p.netloc!="api.ailoot.ai" or p.username or p.password:
    raise SystemExit("Unexpected returned polling URL; preserve the response")
subprocess.run(["curl","--fail-with-body","--silent","--show-error",u,"-H","Authorization: Bearer "+os.environ["AILOOT_API_KEY"],"-D","status-headers.txt","-o","status.json"],check=True)
# Read this same original polling_url again while pending.
# Preserve unknown/result_pending_check; do not repeat creation.
PY_STATUS
```

```bash
set -eu
: "${AILOOT_API_KEY:?Set your Ailoot API key}"
export AILOOT_API_KEY
python3 - <<'PY_ASSETS'
import json,os,subprocess
from pathlib import Path
from urllib.parse import urljoin,urlsplit
r=json.loads(Path("status.json").read_text())
roles={}
def visit(v,path=""):
    if isinstance(v,dict):
        for k,x in v.items(): visit(x,path+"/"+k)
    elif isinstance(v,list):
        for i,x in enumerate(v): visit(x,path+"/"+str(i))
    elif isinstance(v,str):
        u=urljoin("https://api.ailoot.ai",v); p=urlsplit(u)
        if p.scheme=="https" and p.netloc=="api.ailoot.ai" and not p.username and not p.password and p.path.startswith("/v1/media/assets/") and p.path.endswith("/content"):
            roles.setdefault(u,[]).append(path)
visit(r)
if not roles: raise SystemExit("No completed owned assets; retain the original status")
manifest=[]
for i,(u,paths) in enumerate(roles.items()):
    target=Path(f"asset-{i}.bin")
    subprocess.run(["curl","--fail-with-body","--silent","--show-error",u,"-H","Authorization: Bearer "+os.environ["AILOOT_API_KEY"],"-o",str(target)],check=True)
    raw=target.read_bytes()
    if not raw: raise SystemExit("Empty asset; retain original status and metadata")
    ext="glb" if raw[:4]==b"glTF" else "png" if raw[:8]==b"\x89PNG\r\n\x1a\n" else "jpg" if raw[:3]==b"\xff\xd8\xff" else "webp" if raw[:4]==b"RIFF" and raw[8:12]==b"WEBP" else "mp4" if raw[4:8]==b"ftyp" else "bin"
    name=f"asset-{i}.{ext}"
    if target.name!=name: target.rename(name)
    manifest.append({"file":name,"response_paths":paths,"bytes":len(raw)})
Path("asset-manifest.json").write_text(json.dumps(manifest,indent=2))
print("Saved",len(manifest),"unique owned assets; every response role retained")
PY_ASSETS
```

### Receive and save results

#### Ailoot Ultra · Video

- `GET /v1/videos/{request_id}`
- `GET /v1/videos/generations/{request_id}`
- `GET /v1/videos/{request_id}/content`
- `GET /v1/media/assets`
- `GET /v1/media/assets/{asset_id}`

##### Keep all completed results

Save every completed video or returned file; retrieve every actual returned asset URL.

Retain the complete response and headers, original identifiers, every actual output and all usage/accounting fields. Save each unique owned asset and retain every role pointing to it.

##### If the original response needs checking

Keep the returned public task or operation id and all headers. Read only the original task; unknown or result\_pending\_check does not authorize another creation.

Response fields

| Field | Type |
| --- | --- |
| Field`id` | Typestring |
| Field`polling_url` | Typestring |
| Field`provider_task_id` | Typestring |
| Field`task_id` | Typestring |
| Field`status` | Typestring |
| Field`video_url` | Typestring |

Errors and next steps

| Response | Condition | Next step |
| --- | --- | --- |
| Response400 · `invalid_request_error` | ConditionA required field, model selector, type or input representation is invalid. | Next stepInspect the returned validation detail before preparing a separate request. |
| Response`` | ConditionThe original request or result is unknown or requires a check. | Next stepKeep original identifiers and headers; read only supported status/library records. Do not submit creation again. |

### Aliases

#### Model aliases

**Ailoot Ultra** [`pika-21`](https://ailoot.ai/models/en/#m=pika-21&route=Ultra&caller=pika-21&fmt=videos)

#### Method path aliases

`/v1/videos/generations`

#### Related caller IDs

[`pika-21`](https://ailoot.ai/models/en/#m=pika-21&route=Ultra&caller=pika-21&fmt=videos)

FAQ · Pika 2.1

What inputs and results are available?

`POST /v1/videos` · `pika-21`: `text`, `image` → `video`

Which fields does the request use?

`POST /v1/videos` · `pika-21`: `model`, `image`, `prompt`, `negative_prompt`

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