Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and...
Specs
anthropic/claude-haiku-5.5How to use Anthropic: Claude Haiku 5.5 in your app
The quickest way is through an API gateway such as OpenRouter, which uses the same format as the OpenAI API. Create a key, then send a request with the model ID anthropic/claude-haiku-5.5:
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Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Questions about Anthropic: Claude Haiku 5.5
What is Anthropic: Claude Haiku 5.5?
Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and...
How big is the context window of Anthropic: Claude Haiku 5.5?
Anthropic: Claude Haiku 5.5 can read up to 1,000,000 tokens in one request, roughly 750,000 words.
Is Anthropic: Claude Haiku 5.5 open source?
Anthropic: Claude Haiku 5.5 does not have downloadable weights. You use it through Anthropic or an API provider.
What can Anthropic: Claude Haiku 5.5 take as input?
Anthropic: Claude Haiku 5.5 accepts text, image, file and produces text.
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Specs and prices come from OpenRouter and the provider, and are refreshed daily. Last checked 7 Oct 2026.