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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
One change · api

Beta changed

api/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.

Recorded here
Lines+285added
Lines−242removed
From line 5,043 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits16to this page, all time

The whole hunk

from line 5043, old and new numbered
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from line 5043
50435043 
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.
50495049 
from line 6534
65346534 
65356535 minimum: 0
65366536 
6537 - `model: Model`
6537 - `model: Model or null`
65386538 
65396539 The model that will complete your prompt.
65406540 
from line 6632
66326632 
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"`
66416643 
from line 8770
87688770 
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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