Beta changedapi/beta
Nearest release: v2.1.272, published 5 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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Lines+285added
Lines−242removed
From line
5,043
where the diff opens
First seen
14 Aug 2026
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Recorded edits45to this page, all time
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from line 5043
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50445044- `temperature: optional number`
50455045
5046 **Deprecated**: Deprecated. Models released after Claude Opus 4.6 do not support setting temperature. A value of 1.0 of will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
5046 **Deprecated**: Deprecated. Models released after Claude Opus 4.6 do not support setting temperature. A value of 1.0 will be accepted for backwards compatibility, all other values will be rejected with a 400 error.
50475047
50485048 Amount of randomness injected into the response.
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from line 6534
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65356535 minimum: 0
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6537 - `model: Model`
6537 - `model: Model or null`
65386538
65396539 The model that will complete your prompt.
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from line 6632
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66336633 Token usage for the fallback-model attempt of a server-side fallback request.
66346634
6635 Produced in place of a `message` entry for whichever hop served the
6636 response. A declined hop produces the existing `message` entry. Whether
6637 a fallback model served the response is signalled by the presence of this
6638 entry in `usage.iterations`.
6635 The terminal entry of a fallback-served turn: when a fallback hop's
6636 output is the returned message, the entry for the iteration that
6637 completed it carries this type in place of `message`. A declined hop
6638 and the serving hop's earlier tool-loop iterations produce `message`
6639 entries. Whether a fallback model served the response is signalled by
6640 the presence of this entry in `usage.iterations`.
66396641
66406642 - `type: "fallback_message"`
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from line 8770
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87698771 - `edits: optional array of BetaClearToolUses20250919Edit or BetaClearThinking20251015Edit or BetaCompact20260112Edit`
87708772
8771 List of context management edits to apply
8772
8773 minItems: 0
8774
8775 - `BetaClearToolUses20250919Edit object`
8776
8777 - `type: "clear_tool_uses_20250919"`
8778
8779 - `clear_at_least: optional BetaInputTokensClearA
8773 List of context management edits to
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