Source: https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/
Canonical: https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/
Language: en

# Anthropic: Claude Haiku 5.5

[Markdown](https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/index.md) · [JSON](https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/facts.json)

## [Anthropic: Claude Haiku 5.5](https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/)

Claude Haiku 5.5 is Anthropic’s small model for classification, extraction, summaries, routing and focused agent tasks. It combines text and image understanding with adaptive reasoning and is shaped for repetitive work that needs a prompt response.

- [**Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions` `anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/#method-0)
- [**Ailoot Ultra · Anthropic Messages** `POST /v1/messages` `anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/#method-1)
- [**Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions` `~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/#method-2)
- [**Ailoot Ultra · Anthropic Messages** `POST /v1/messages` `~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/#method-3)

About the model

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

Claude Haiku 5.5 is Anthropic’s small-model edition for high-volume, latency-sensitive tasks. Its main uses include classification, routing, information extraction, summarisation, conversation compaction and focused subagent work. It accepts text and images and generates text. A useful brief gives it a narrow question and an explicit result: a category, a defined set of fields, a short summary or the relevant evidence for another part of a larger task. Keep the source identifiers with the result so an application can connect the extracted information to its original material.

Anthropic positions this edition for live customer support, browser use and short coding subtasks as well as repetitive analysis. It can complement Claude Sonnet 5.5 or Claude Opus 5.5 in a workflow where a larger model handles an ambitious project and Haiku handles a bounded lookup or summary. For a support task, supply the question and the permitted reference material, then specify the response tone and what must be returned. For a coding subtask, identify the relevant files or excerpts and the exact question, rather than assigning an open-ended project without a completion condition.

The documented context window is one million tokens, with up to 128,000 output tokens in ordinary generation. Thinking tokens count towards the generation allowance, so the result needs room for both reasoning and visible text. Its reliable knowledge cutoff is June 2026; later information needs supplied evidence or a search tool. Anthropic separately documents a batch-only beta that can raise output to 300,000 tokens for this edition. That larger allowance requires the producer’s extended-output feature and is distinct from the ordinary limit. An asynchronous batch handles requests independently, making it useful for collections of documents or records whose results are needed after processing rather than immediately.

Adaptive thinking is enabled by default, and effort is the main control for reasoning depth. The levels are low, medium, high, xhigh and max, with medium as the default. Anthropic recommends medium for most work, high for more sustained tasks or strict instruction following, and low for simpler, short requests. Thinking can be disabled at low, medium or high; disabling it at xhigh or max is rejected. A prompt asking for a direct answer does not substitute for that control. Manual budget\_tokens settings from Haiku 4.5 do not transfer to this edition, and temperature, top\_p and top\_k should be omitted in the documented interface.

Haiku 5.5 uses the newer tokenizer introduced in earlier Claude generations, and Anthropic estimates that the same text can use roughly 30% more tokens than on Haiku 4.5, depending on its content. It also retains thinking blocks from earlier assistant turns, so conversation size can grow beyond the tokenizer change alone. Its minimum cacheable prompt length is 512 tokens. Keep earlier turns unchanged when retaining reasoning, and put new instructions in the newest turn. Changing top-level effort invalidates the conversation’s message cache; the producer documents a separate beta for changing effort within adaptive conversations. None of these capabilities establishes a cache hit for a particular request.

For retrieval, the model’s prompting guide recommends supplying the current date with the search tool and keeping the original system and tool definitions stable. Give a fresh date in the newest turn if the conversation continues on a later day. State what must be found and preserve the returned sources before asking for a conclusion. For example, an illustrative task could ask for the documented behaviour of a specified software version, followed by a short explanation grounded in the retrieved passage. The application supplies the search tool and returns its actual results; the model’s proposed lookup is not evidence that the lookup happened.

When structured JSON output is combined with tools, the guide documents a specific interaction: with thinking disabled, Haiku can skip a necessary tool call. Anthropic recommends adaptive thinking for such requests, or separating the final JSON requirement from the tool step. Define the output fields and make clear that the final answer follows the tool results. A data-extraction brief can name the required fields and how to represent missing values, while a lookup brief can first request the evidence needed to fill them. Read response blocks by their type, since the answer need not be the first block and thinking text is omitted by default.

For longer agent prompts, Anthropic notes that low effort can stop early, skip a search or omit a check. Its guide recommends explicit completion instructions and real checks for code changes before they are reported as finished. Prepare the expected result and the evidence that would demonstrate it: the selected passages for a report, the changed behaviour for a code proposal or the fields extracted from a document. The guide also distinguishes a user’s mid-task message from tool output: new user instructions belong in a user turn, while the returned tool evidence remains separate.

This edition has its own safeguards and can return a refusal for categories including cyber harm, biological harm, competing-model development or other prohibited uses. The producer does not document server-side fallback for Haiku 5.5. Its guide also notes that xhigh effort can occasionally end a multi-turn response without visible answer text, and that reasoning-like text can appear more often at low effort or with thinking disabled. These are specific behaviours to account for when a workflow requires a visible, structured result. For ordinary extraction or summary work, use a focused source, a defined output and the effort level appropriate to the task.

Practical task

### Extract a support handoff

Technical example in English

```
Extract a support handoff

Extract a handoff from this ticket, using only its text: T-184: 'I changed my billing email yesterday. Receipts still go to the old address. My login works. Please resend March and April receipts.' Return ticket ID, requested actions, working function and missing information. Use 'not stated' for absent details.
```

#### Expected result

```
Four labeled fields retaining T-184, the receipt request, the working login and explicitly missing details.
```

#### Check the result

```
Every extracted value must trace to the ticket; do not invent either email address.
```

**Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions` `anthropic/claude-haiku-5.5`

[`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=chat)

Anthropic /`anthropic/claude-haiku-5.5`

Model ID

- `anthropic/claude-haiku-5.5`
- `~anthropic/claude-haiku-latest`

### Overview

Claude Haiku 5.5 is Anthropic’s small model for classification, extraction, summaries, routing and focused agent tasks. It combines text and image understanding with adaptive reasoning and is shaped for repetitive work that needs a prompt response.

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 anthropic/claude-haiku-5.5 | 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

Reasoning effort · high

Standard rate When reasoning effort is high

Reasoning effort · low

Standard rate When reasoning effort is low

Reasoning effort · max

Standard rate When reasoning effort is max

Reasoning effort · medium

Standard rate When reasoning effort is medium

Reasoning effort · xhigh

Standard rate When reasoning effort is xhigh

#### 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 **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.0004** / 1K tokens |
| ConfigurationRequest-length tier 1 | Rate schedule— | Context tokens, more than0 | Context tokens, up to and including100,000 | Charge Input · Input tokens **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.0004** / 1K tokens |
| ConfigurationRequest-length tier 2 | Rate schedule— | Context tokens, more than100,000 | Context tokens, up to and includingNo upper bound | Charge Input · Input tokens **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.002** / 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": "anthropic/claude-haiku-5.5", "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='anthropic/claude-haiku-5.5',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='anthropic/claude-haiku-5.5',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

**Ailoot Ultra** [`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=chat), [`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=chat)

#### Method path aliases

Use the method paths shown above.

#### Related caller IDs

[`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=chat), [`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=chat)

**Ailoot Ultra · Anthropic Messages** `POST /v1/messages` `anthropic/claude-haiku-5.5`

[`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=messages)

Anthropic /`anthropic/claude-haiku-5.5`

Model ID

- `anthropic/claude-haiku-5.5`
- `~anthropic/claude-haiku-latest`

### Overview

Claude Haiku 5.5 is Anthropic’s small model for classification, extraction, summaries, routing and focused agent tasks. It combines text and image understanding with adaptive reasoning and is shaped for repetitive work that needs a prompt response.

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 anthropic/claude-haiku-5.5 | 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

Reasoning effort · high

Standard rate When reasoning effort is high

Reasoning effort · low

Standard rate When reasoning effort is low

Reasoning effort · max

Standard rate When reasoning effort is max

Reasoning effort · medium

Standard rate When reasoning effort is medium

Reasoning effort · xhigh

Standard rate When reasoning effort is xhigh

#### 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 **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.0004** / 1K tokens |
| ConfigurationRequest-length tier 1 | Rate schedule— | Context tokens, more than0 | Context tokens, up to and including100,000 | Charge Input · Input tokens **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.0004** / 1K tokens |
| ConfigurationRequest-length tier 2 | Rate schedule— | Context tokens, more than100,000 | Context tokens, up to and includingNo upper bound | Charge Input · Input tokens **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.002** / 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": "anthropic/claude-haiku-5.5",
  "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': 'anthropic/claude-haiku-5.5', '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': 'anthropic/claude-haiku-5.5', '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

**Ailoot Ultra** [`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=messages), [`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=messages)

#### Method path aliases

Use the method paths shown above.

#### Related caller IDs

[`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=messages), [`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=messages)

**Ailoot Ultra · OpenAI Chat** `POST /v1/chat/completions` `~anthropic/claude-haiku-latest`

[`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=chat)

Anthropic /`~anthropic/claude-haiku-latest`

Model ID

- `anthropic/claude-haiku-5.5`
- `~anthropic/claude-haiku-latest`

### Overview

Claude Haiku 5.5 is Anthropic’s small model for classification, extraction, summaries, routing and focused agent tasks. It combines text and image understanding with adaptive reasoning and is shaped for repetitive work that needs a prompt response.

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 ~anthropic/claude-haiku-latest | 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

Reasoning effort · high

Standard rate When reasoning effort is high

Reasoning effort · low

Standard rate When reasoning effort is low

Reasoning effort · max

Standard rate When reasoning effort is max

Reasoning effort · medium

Standard rate When reasoning effort is medium

Reasoning effort · xhigh

Standard rate When reasoning effort is xhigh

#### 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 **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.0004** / 1K tokens |
| ConfigurationRequest-length tier 1 | Rate schedule— | Context tokens, more than0 | Context tokens, up to and including100,000 | Charge Input · Input tokens **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.0004** / 1K tokens |
| ConfigurationRequest-length tier 2 | Rate schedule— | Context tokens, more than100,000 | Context tokens, up to and includingNo upper bound | Charge Input · Input tokens **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.002** / 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": "~anthropic/claude-haiku-latest", "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='~anthropic/claude-haiku-latest',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='~anthropic/claude-haiku-latest',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

**Ailoot Ultra** [`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=chat), [`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=chat)

#### Method path aliases

Use the method paths shown above.

#### Related caller IDs

[`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=chat), [`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=chat)

**Ailoot Ultra · Anthropic Messages** `POST /v1/messages` `~anthropic/claude-haiku-latest`

[`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=messages)

Anthropic /`~anthropic/claude-haiku-latest`

Model ID

- `anthropic/claude-haiku-5.5`
- `~anthropic/claude-haiku-latest`

### Overview

Claude Haiku 5.5 is Anthropic’s small model for classification, extraction, summaries, routing and focused agent tasks. It combines text and image understanding with adaptive reasoning and is shaped for repetitive work that needs a prompt response.

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 ~anthropic/claude-haiku-latest | 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

Reasoning effort · high

Standard rate When reasoning effort is high

Reasoning effort · low

Standard rate When reasoning effort is low

Reasoning effort · max

Standard rate When reasoning effort is max

Reasoning effort · medium

Standard rate When reasoning effort is medium

Reasoning effort · xhigh

Standard rate When reasoning effort is xhigh

#### 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 **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.0004** / 1K tokens |
| ConfigurationRequest-length tier 1 | Rate schedule— | Context tokens, more than0 | Context tokens, up to and including100,000 | Charge Input · Input tokens **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.0004** / 1K tokens |
| ConfigurationRequest-length tier 2 | Rate schedule— | Context tokens, more than100,000 | Context tokens, up to and includingNo upper bound | Charge Input · Input tokens **$0.0002** / 1K tokens Output · Output tokens **$0.001** / 1K tokens Input · Cache read **$0.00002** / 1K tokens Input · Cache write **$0.00025** / 1K tokens Input · Cache write, 1 hour **$0.002** / 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": "~anthropic/claude-haiku-latest",
  "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': '~anthropic/claude-haiku-latest', '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': '~anthropic/claude-haiku-latest', '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

**Ailoot Ultra** [`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=messages), [`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=messages)

#### Method path aliases

Use the method paths shown above.

#### Related caller IDs

[`anthropic/claude-haiku-5.5`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=anthropic%2Fclaude-haiku-5.5&fmt=messages), [`~anthropic/claude-haiku-latest`](https://ailoot.ai/models/en/#m=anthropic%2Fclaude-haiku-5.5&route=Ultra&caller=~anthropic%2Fclaude-haiku-latest&fmt=messages)

FAQ · Anthropic: Claude Haiku 5.5

What inputs and results are available?

`POST /v1/chat/completions` · `anthropic/claude-haiku-5.5`: `text` → `text` `POST /v1/messages` · `anthropic/claude-haiku-5.5`: `text` → `json`, `sse` `POST /v1/chat/completions` · `~anthropic/claude-haiku-latest`: `text` → `text` `POST /v1/messages` · `~anthropic/claude-haiku-latest`: `text` → `json`, `sse`

Which fields does the request use?

`POST /v1/chat/completions` · `anthropic/claude-haiku-5.5`: `model`, `messages`, `stream`, `modalities`, `provider` `POST /v1/messages` · `anthropic/claude-haiku-5.5`: `model`, `messages`, `max_tokens`, `stream` `POST /v1/chat/completions` · `~anthropic/claude-haiku-latest`: `model`, `messages`, `stream`, `modalities`, `provider` `POST /v1/messages` · `~anthropic/claude-haiku-latest`: `model`, `messages`, `max_tokens`, `stream`

What limits apply?

`POST /v1/chat/completions` · `anthropic/claude-haiku-5.5`: `messages.min_items`: `1` `POST /v1/chat/completions` · `~anthropic/claude-haiku-latest`: `messages.min_items`: `1`

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

## The company and its project portfolio

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

## Buy tokens at a discount.

Subscription discounts for regular use. Promo codes offer up to 50% off token purchases.

Subscription

Choose a discounted plan for your regular requests.

Promo code: up to 50% off

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

Spending in your history

The model, tokens and amount are recorded for each request.

[Choose a subscription](https://ailoot.ai/docs/en/billing/subscriptions/) · [View model prices](https://ailoot.ai/models/en/)

## Connect the API to a product you sell.

Use Ailoot in SaaS, apps and bots under its official service offer and licence agreement. Request a reseller licence for resale.

Commercial application

Add text, image, video and audio generation to paid features in your service.

Reseller licence

Send a description of your project and how you provide access. Request written terms for use and resale.

Documents on the website

The service offer, licence agreement and data processing policy are available before you connect.

[Request a reseller licence](mailto:support@ailoot.ai) · [Service offer and licence agreement](https://ailoot.ai/legal/offer?lang=en)

## 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.


## Available through Ailoot API

`claude-haiku-5-5` · Core

Input types

`text`

Output types

`text`

Context

200,000 *tokens*

Max. output

65,536 *tokens*

Input

$0.0001 */ 1K*

Output

$0.0005 */ 1K*

Cache read

$0.00001 */ 1K*

Cache write

$0.000125 */ 1K*

Cache write, 5 min

$0.000125 */ 1K tokens*

Cache write, 1 hour

$0.0002 */ 1K tokens*

web\_search\_call

$0.01 *per call*

Max. calls for web\_search\_call

8

#### Prices by request length · Anthropic Messages

| Request size, tokens | Input | Output | Cache read | Cache write | 5 min cache | 1 hour cache |
| --- | --- | --- | --- | --- | --- | --- |
| Request size, tokens(0; 100,000\] | Input$0.0001 | Output$0.0005 | Cache read$0.00001 | Cache write$0.000125 | 5 min cache$0.000125 | 1 hour cache$0.0002 |
| Request size, tokens(100,000; ∞) | Input$0.0005 | Output$0.0025 | Cache read$0.00005 | Cache write$0.000625 | 5 min cache$0.000625 | 1 hour cache$0.001 |

Rates in USD per 1K tokens. If no rate is set, the base rate for this method is inherited; «—» means no base rate is set.

`claude-haiku-5-5` · Core

Input types

`text`

Output types

`text`

Context

200,000 *tokens*

Max. output

65,536 *tokens*

Input

$0.0001 */ 1K*

Output

$0.0005 */ 1K*

Cache read

$0.00001 */ 1K*

Cache write

$0.000125 */ 1K*

Cache write, 5 min

$0.000125 */ 1K tokens*

Cache write, 1 hour

$0.0002 */ 1K tokens*

web\_search\_call

$0.01 *per call*

Max. calls for web\_search\_call

8

#### Prices by request length · OpenAI Responses

| Request size, tokens | Input | Output | Cache read | Cache write | 5 min cache | 1 hour cache |
| --- | --- | --- | --- | --- | --- | --- |
| Request size, tokens(0; 100,000\] | Input$0.0001 | Output$0.0005 | Cache read$0.00001 | Cache write$0.000125 | 5 min cache$0.000125 | 1 hour cache$0.0002 |
| Request size, tokens(100,000; ∞) | Input$0.0005 | Output$0.0025 | Cache read$0.00005 | Cache write$0.000625 | 5 min cache$0.000625 | 1 hour cache$0.001 |

Rates in USD per 1K tokens. If no rate is set, the base rate for this method is inherited; «—» means no base rate is set.

`claude-haiku-5-5` · Core

Input types

`text`

Output types

`text`

Context

200,000 *tokens*

Max. output

65,536 *tokens*

Input

$0.0001 */ 1K*

Output

$0.0005 */ 1K*

Cache read

$0.00001 */ 1K*

Cache write

$0.000125 */ 1K*

Cache write, 5 min

$0.000125 */ 1K tokens*

Cache write, 1 hour

$0.0002 */ 1K tokens*

web\_search\_call

$0.01 *per call*

Max. calls for web\_search\_call

8

#### Prices by request length · OpenAI Chat

| Request size, tokens | Input | Output | Cache read | Cache write | 5 min cache | 1 hour cache |
| --- | --- | --- | --- | --- | --- | --- |
| Request size, tokens(0; 100,000\] | Input$0.0001 | Output$0.0005 | Cache read$0.00001 | Cache write$0.000125 | 5 min cache$0.000125 | 1 hour cache$0.0002 |
| Request size, tokens(100,000; ∞) | Input$0.0005 | Output$0.0025 | Cache read$0.00005 | Cache write$0.000625 | 5 min cache$0.000625 | 1 hour cache$0.001 |

Rates in USD per 1K tokens. If no rate is set, the base rate for this method is inherited; «—» means no base rate is set.

`claude-haiku-5-5` · Core

Input types

`text`

Output types

`text`

Context

200,000 *tokens*

Max. output

65,536 *tokens*

Input

$0.0001 */ 1K*

Output

$0.0005 */ 1K*

Cache read

$0.00001 */ 1K*

Cache write

$0.000125 */ 1K*

Cache write, 5 min

$0.000125 */ 1K tokens*

Cache write, 1 hour

$0.0002 */ 1K tokens*

web\_search\_call

$0.01 *per call*

Max. calls for web\_search\_call

8

#### Prices by request length · Gemini generateContent

| Request size, tokens | Input | Output | Cache read | Cache write | 5 min cache | 1 hour cache |
| --- | --- | --- | --- | --- | --- | --- |
| Request size, tokens(0; 100,000\] | Input$0.0001 | Output$0.0005 | Cache read$0.00001 | Cache write$0.000125 | 5 min cache$0.000125 | 1 hour cache$0.0002 |
| Request size, tokens(100,000; ∞) | Input$0.0005 | Output$0.0025 | Cache read$0.00005 | Cache write$0.000625 | 5 min cache$0.000625 | 1 hour cache$0.001 |

Rates in USD per 1K tokens. If no rate is set, the base rate for this method is inherited; «—» means no base rate is set.

[JSON](https://ailoot.ai/models/en/anthropic-claude-haiku-5-5/method-additions-8e37fd5f7aee2327526b.json)