LLM models
Claude Fable 5
On this page
Claude Fable 5 — frontier reasoning and generation through one API.
| modelId | claude-fable-5 |
| Modality | text |
| Pricing | See this model on the Pricing page for the current per-call price (with your markup). |
Operations
| Operation | modelId | Endpoint | Required input |
|---|---|---|---|
| Default | claude-fable-5 | POST /api/v1/generate | prompt |
| Poll task | — | GET /api/v1/task/{id}?model=claude-fable-5 | — |
Input parameters
| Field | Type | Required | Values / example |
|---|---|---|---|
| prompt | string | Yes | Text value (default: Write the opening paragraph of a mystery novel set in a fog-bound harbor town, and end on a single sentence that makes the reader need to turn the page.) |
| memory | boolean | No | Automatically append previous messages to maintain multi-turn context. May increase token usage. (true/false) (default: false) |
| thinking | boolean | No | Include the model's thinking process in the response (true/false) (default: true) |
| max_tokens | number | No | Optional Claude output token limit. Leave empty to use the default of 4096. (range 1-128000) |
| stream | boolean | No | Turn off to get a single non-streaming response. (true/false) (default: true) |
| system | string | No | System instruction for the model. Defaults to "You are Claude Fable 5, developed by Anthropic." when omitted. |
Example request
bash
curl -X POST https://you.bot/api/v1/generate \
-H "Authorization: Bearer $YOUBOT_API_KEY" \
-H "Content-Type: application/json" \
-d '{"modelId":"claude-fable-5","input":{"prompt":"Explain how diffusion models generate images, in two short sentences.","memory":false,"thinking":true,"max_tokens":1,"stream":true}}'