Messages changedapi/messages
Nearest release: v2.1.281, published an hour 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+46added
Lines−10removed
From line
1,075
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits13to this page, all time
The whole hunk
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from line 1075
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10761076 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
10771077
1078 - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
1078 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
10791079
10801080 The model that will complete your prompt.
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10861086 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
10871087
1088 - `"claude-opus-5-5"`
1089
1090 Powerful intelligence for coding, knowledge work, and long-running agents
1091
10881092 - `"claude-mythos-5-1"`
10891093
10901094 Our most capable model for cybersecurity and biology research, available through trusted access programs
from line 3870
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38673871 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
38683872
3869 - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
3873 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
38703874
38713875 The model that will complete your prompt.
38723876
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38773881 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
38783882
3883 - `"claude-opus-5-5"`
3884
3885 Powerful intelligence for coding, knowledge work, and long-running agents
3886
38793887 - `"claude-mythos-5-1"`
38803888
38813889 Our most capable model for cybersecurity and biology research, available through trusted access programs
from line 5498
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54915499 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
54925500
5493 - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
5501 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
54945502
54955503 The model that will complete your prompt.
54965504
from line 5508
55005508
55015509 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
55025510
5511 - `"claude-opus-5-5"`
5512
5513 Powerful intelligence for coding, knowledge work, and long-running agents
5514
55035515 - `"claude-mythos-5-1"`
55045516
55055517 Our most capable model for cybersecurity and biology research, available through trusted access programs
from line 8417
84058417
84068418 - `url: string`
84078419
8408 The final post-redirect URL the download was served from.
8409
8410 maxLength: 4096, pattern: ^[^\x00-\x1f\x7f-\x9f\u2028\u2029]*$
8411
8412### Browser State Change Tab Opened
8413
8414- `BrowserStateChangeTabOpened object`
8415
8416 A tab this call's execution opened that remains open at its end —
8417 the creation delta of the `tabs` inventory, not an event log.
8418
8419 C
8420 The final post
No line in this hunk matches that.