Claude Haiku 5.5 API

Input / 1M tokens$0.088~~$0.10~~

Output / 1M tokens$0.44~~$0.50~~

LLMAnthropicNew12% below official1M contextPrompt cachingAnthropic API

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About Claude Haiku 5.5

Claude Haiku 5.5 by Anthropic is available on API Many from $0.088 per million input tokens and $0.44 per million output tokens, and you call it with the same API key you use for every other model.

It accepts OpenAI-style chat requests with streaming and tools, has a 1M context window and can return up to 128,000 tokens per response.

Claude models also speak the Anthropic Messages API at /v1/messages, so the official Anthropic SDK works by changing only the base URL.

Prompt caching is supported: cached input tokens are billed at the lower cached rate shown in the price table.

You pay only for successful results: failed or rejected requests are refunded automatically, and every call is recorded in your console with its exact cost.

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Frequently asked questions

How much does the Claude Haiku 5.5 API cost?

Claude Haiku 5.5 starts at $0.088 per million input tokens and $0.44 per million output tokens on API Many. The price table on this page lists every tier; you are charged only for successful requests.

How do I call Claude Haiku 5.5?

Create an API key in the console, then send a request to /v1/chat/completions with "model": "claude-haiku-5-5". The API tab has copy-ready examples in cURL, Python and Node.js.

Is this the official Claude Haiku 5.5 model?

Yes. Requests are forwarded to the model maker or an authorized channel with the same parameters, so the output matches the official API.

What happens if a request fails?

Failed, rejected or timed-out requests are not charged. Reserved balance is released automatically and the reason is shown in the call record.