Create a Message changedapi/messages/create
Nearest release: v2.1.287, published 4 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+20added
Lines−12removed
From line
1,137
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 1137, old and new numbered
/
from line 1137
11371137
11381138 Powerful intelligence for long-running agents and coding
11391139
1140 - `"claude-mythos-preview"`
1141
1142 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
1143
1144 New class of intelligence, strongest in coding and cybersecurity
1145
11401146 - `"claude-sonnet-4-5"`
11411147
1148 **Deprecated**: Will reach end-of-life on November 30, 2026. Please migrate to claude-sonnet-5-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
1149
11421150 High-performance model for agents and coding
11431151
11441152 - `"claude-sonnet-4-5-20250929"`
11451153
1154 **Deprecated**: Will reach end-of-life on November 30, 2026. Please migrate to claude-sonnet-5-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
1155
11461156 High-performance model for agents and coding
11471157
1148 - `"claude-mythos-preview"`
1149
1150 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
1151
1152 New class of intelligence, strongest in coding and cybersecurity
1153
11541158 - `string`
11551159
11561160- `cache_control: optional CacheControlEphemeral or null`
from line 3982
39783982
39793983 Powerful intelligence for long-running agents and coding
39803984
3985 - `"claude-mythos-preview"`
3986
3987 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
3988
3989 New class of intelligence, strongest in coding and cybersecurity
3990
39813991 - `"claude-sonnet-4-5"`
39823992
3993 **Deprecated**: Will reach end-of-life on November 30, 2026. Please migrate to claude-sonnet-5-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
3994
39833995 High-performance model for agents and coding
39843996
39853997 - `"claude-sonnet-4-5-20250929"`
39863998
3987 High-performance model for agents and coding
3999 **Deprecated**: Will reach end-of-life on November 30, 2026. Please migrate to claude-sonnet-5-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
39884000
3989 - `"claude-mythos-preview"`
3990
3991 **Deprecated**: Will reach end-of-life on June 30, 2026. Please migrate to claude-mythos-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
3992
3993 New class of intelligence, strongest in coding and cybersecurity
4001 High-performance model for agents and coding
39944002
39954003 - `string`
39964004
No line in this hunk matches that.