Beta changedapi/beta
Nearest release: v2.1.301, published 11 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
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14 Aug 2026
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53425342 The inference speed mode for this request. `"fast"` enables high output-tokens-per-second inference.
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5344 Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_languages=http) for which models.
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53445346 - `"standard"`
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53465348 - `"fast"`
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77127714 - `enabled: optional boolean or null`
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7714 Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
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7716 - `zoom: optional BetaComputerZoomConfig or null`
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7718 `zoom`'s config overrides.
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7720 - `defer_load
7716 Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resol
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