LLM models
Claude Haiku 4.5
On this page
Claude Haiku 4.5 — frontier reasoning and generation through one API.
| modelId | claude-haiku-4-5 |
| 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-haiku-4-5 | POST /api/v1/generate | prompt |
| Poll task | — | GET /api/v1/task/{id}?model=claude-haiku-4-5 | — |
Input parameters
| Field | Type | Required | Values / example |
|---|---|---|---|
| prompt | string | Yes | Text value (example: Summarize the plot of a classic bank-heist film in exactly three suspenseful sentences, no spoilers past the setup.) |
| memory | boolean | No | Automatically append previous messages to maintain multi-turn context. May increase token usage. (true/false) (default: false) |
| max_tokens | number | No | Optional Claude output token limit. Leave empty to use the default of 4096. (range 1-128000) |
| stream | boolean | No | Send true to receive the reply as an event stream (Content-Type: text/event-stream). Omit it and you get a single JSON response — streaming is opt-in on this endpoint. (true/false) (example: true) |
| system | string | No | System instruction for the model. Defaults to "You are Claude Haiku 4.5, developed by Anthropic." when omitted. |
| messages | array | No | A conversation instead of a single `prompt`: up to 20 objects of { "role", "content" }, where role is user, assistant or system. Send `prompt` or `messages`, not both. Do not flatten a conversation into one prompt with "User:" / "Assistant:" labels — the model reads that as a single message, and a model using web search then searches for the whole block instead of your question. |
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-haiku-4-5","input":{"prompt":"Summarize the plot of a classic bank-heist film in exactly three suspenseful sentences, no spoilers past the setup.","memory":false,"max_tokens":1,"stream":true}}'