overview changedmodels/sonnet-5/overview
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8181## Good to know
8282
8383* On the [Message Batches API](https://platform.claude.com/docs/en/build-with-claude/batch-processing#extended-output-beta), Claude Sonnet 5 supports up to 300k output tokens with the `output-300k-2026-03-24` beta header.
84* Setting `temperature`, `top_p`, or `top_k` to non-default values returns a 400 error.
84* Setting `temperature`, `top_p`, or `top_k` returns a 400 error.
8585* Query limits and capabilities programmatically with the [Models API](https://platform.claude.com/docs/en/api/models/list).
8686
8787## Resources
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