# Claude Haiku 5.5 (`claude-haiku-5-5`) Call claude-haiku-5-5 on Lazu for $0.10 per million input tokens and $0.50 per million output tokens, the same as the Anthropic official price. 1M context, up to 128k output tokens, with Tool calling, Vision, Reasoning and Structured output. Claude Haiku 5.5, the fastest and lowest-cost model in the Claude 5.5 family, for high-volume and sub-agent work. ## Facts - **Context:** 1M - **Max output:** 128k - **Knowledge cutoff:** 2026-06 - **Input:** Text · Image · PDF - **Output:** Text - **Endpoints:** /v1/messages · /v1/chat/completions ## Prices (USD per million tokens) | Lane | Input | Output | Cache read | Cache write 5m | 7-day availability | |---|---|---|---|---|---| | Anthropic official price | $0.10 | $0.50 | — | — | — | | Anthropic official, input over 100k tokens | $0.50 | $2.50 | — | — | — | | Stable | $0.10 | $0.50 | $0.01 | $0.125 | 99.71% | | Stable, input over 100k tokens | $0.50 | $2.50 | $0.05 | $0.625 | — | A request whose input tokens (cache reads and writes included) pass the threshold is billed entirely at the long-context prices, not only for the tokens above it. Prices checked 2026-11-03 19:03 UTC ## Capabilities Tool calling, Vision, Reasoning, Structured output, Prompt caching, PDF input Reasoning effort: low, medium, high, xhigh, max Unsupported parameters: temperature, top_p ## Example request (POST /v1/messages) ```bash curl -X POST https://api.lazu.ai/v1/messages \ -H "Authorization: Bearer $LAZU_API_KEY" \ -H "anthropic-version: 2023-06-01" \ -H "Content-Type: application/json" \ -d '{ "model": "claude-haiku-5-5", "max_tokens": 1024, "messages": [{ "role": "user", "content": "Hello from Lazu" }] }' ``` Any OpenAI SDK works: set `base_url` to `https://api.lazu.ai/v1`. Docs: https://lazu.ai/docs ## Questions ### What is the difference between the stable and agent lanes? The stable lane runs on each maker's official API, is billed at the list price, has the highest availability and suits every use. The agent lane runs on third-party subscription pools that serve the model through its official client, not the official API. It costs far less, but availability varies, a failed request does not fall back to the stable lane, and the pool adds its own preset context. So use it only inside the matching agent tool: Claude models in Claude Code, GPT models in Codex, Gemini models in Antigravity. For your own code, or anywhere the output must be controlled exactly, use the stable lane. Both lanes work with the same key, and each key picks the lane per model. ### Can I call claude-haiku-5-5 with the OpenAI SDK? Yes. Point the SDK's base URL at https://api.lazu.ai/v1 and use claude-haiku-5-5 as the model name. The native Messages endpoint /v1/messages works as well. ### How is it billed? Per token actually used — input, output and cache — deducted from your wallet balance. There is no monthly fee, and every request shows up itemized in your usage log.