overview changedmodels/haiku-5-5/overview
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9090## Good to know
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9292* Adaptive thinking is on by default. Control thinking depth with the [effort parameter](https://platform.claude.com/docs/en/build-with-claude/effort).
93* Omit `temperature`, `top_p`, and `top_k`. See [Remove sampling parameters](https://platform.claude.com/docs/en/models/haiku-5-5/migration-guide#remove-sampling-parameters) for the values that return a 400 error.
93* Omit `temperature`, `top_p`, and `top_k`.
9494* On the [Message Batches API](https://platform.claude.com/docs/en/build-with-claude/batch-processing#extended-output-beta), Claude Haiku 5.5 supports up to 300k output tokens with the `output-300k-2026-03-24` beta header.
9595* The minimum cacheable prompt length is 512 tokens. See [Prompt caching](https://platform.claude.com/docs/en/build-with-claude/prompt-caching#cache-limitations).
9696* Query limits and capabilities programmatically with the [Models API](https://platform.claude.com/docs/en/api/models/list).
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