Batches changedapi/beta/messages/batches
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+353added
Lines−345removed
From line
3,928
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First seen
14 Aug 2026
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Recorded edits34to this page, all time
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from line 3928, old and new numbered
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from line 3928
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39293929 - `temperature: optional number`
39303930
3931 **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.
3931 **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.
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39333933 Amount of randomness injected into the response.
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from line 6680
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66816681 minimum: 0
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6683 - `model: Model`
6683 - `model: Model or null`
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66856685 The model that will complete your prompt.
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67796779 Token usage for the fallback-model attempt of a server-side fallback request.
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6781 Produced in place of a `message` entry for whichever hop served the
6782 response. A declined hop produces the existing `message` entry. Whether
6783 a fallback model served the response is signalled by the presence of this
6784 entry in `usage.iterations`.
6781 The terminal entry of a fallback-served turn: when a fallback hop's
6782 output is the returned message, the entry for the iteration that
6783 completed it carries this type in place of `message`. A declined hop
6784 and the serving hop's earlier tool-loop iterations produce `message`
6785 entries. Whether a fallback model served the response is signalled by
6786 the presence of this entry in `usage.iterations`.
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67866788 - `type: "fallback_message"`
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from line 8363
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83628364 The policy category that triggered a refusal.
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8364 - `"cyber"`
8365
8366 The request could enable cyber harm, such as malware or exploit development. Benign cybersecurity work can also trigger this category.
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No line in this hunk matches that.