Create a Message changedapi/messages/create
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+10added
Lines−2removed
From line
1,073
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
from line 1073, old and new numbered
/
from line 1073
10731073
10741074 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
10751075
1076 - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
1076 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
10771077
10781078 The model that will complete your prompt.
10791079
from line 1083
10831083
10841084 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
10851085
1086 - `"claude-opus-5-5"`
1087
1088 Powerful intelligence for coding, knowledge work, and long-running agents
1089
10861090 - `"claude-mythos-5-1"`
10871091
10881092 Our most capable model for cybersecurity and biology research, available through trusted access programs
from line 3868
38643868
38653869 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
38663870
3867 - `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
3871 - `"claude-fable-5-1" or "claude-opus-5-5" or "claude-mythos-5-1" or 15 more`
38683872
38693873 The model that will complete your prompt.
38703874
from line 3877
38733877 - `"claude-fable-5-1"`
38743878
38753879 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
3880
3881 - `"claude-opus-5-5"`
3882
3883 Powerful intelligence for coding, knowledge work, and long-running agents
38763884
38773885 - `"claude-mythos-5-1"`
38783886
No line in this hunk matches that.