Messages changedapi/messages
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Lines+90added
Lines−54removed
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1,139
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First seen
14 Aug 2026
this site's first read of the page
Recorded edits16to this page, all time
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from line 1139
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11401140 Powerful intelligence for long-running agents and coding
11411141
1142 - `"claude-mythos-preview"`
1143
1144 **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.
1145
1146 New class of intelligence, strongest in coding and cybersecurity
1147
11421148 - `"claude-sonnet-4-5"`
11431149
1150 **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.
1151
11441152 High-performance model for agents and coding
11451153
11461154 - `"claude-sonnet-4-5-20250929"`
11471155
1156 **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.
1157
11481158 High-performance model for agents and coding
11491159
1150 - `"claude-mythos-preview"`
1151
1152 **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.
1153
1154 New class of intelligence, strongest in coding and cybersecurity
1155
11561160 - `string`
11571161
11581162- `cache_control: optional CacheControlEphemeral or null`
from line 3984
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39813985 Powerful intelligence for long-running agents and coding
39823986
3987 - `"claude-mythos-preview"`
3988
3989 **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.
3990
3991 New class of intelligence, strongest in coding and cybersecurity
3992
39833993 - `"claude-sonnet-4-5"`
39843994
3995 **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.
3996
39853997 High-performance model for agents and coding
39863998
39873999 - `"claude-sonnet-4-5-20250929"`
39884000
4001 **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.
4002
39894003 High-performance model for agents and coding
39904004
3991 - `"claude-mythos-preview"`
3992
3993 **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.
3994
3995 New class of intelligence, strongest in coding and cybersecurity
3996
39974005 - `string`
39984006
39994007 - `role: "assistant"`
from line 5630
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56235631 Powerful intelligence for long-running agents and coding
56245632
5633 - `"claude-mythos-preview"`
5634
5635 **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.
5636
5637 New class of intelligence, strongest in coding and cybersecurity
5638
56255639 - `"claude-sonnet-4-5"`
56265640
5641 **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.
5642
56275643 High-performance model for agents and coding
56285644
56295645 - `"claude-sonnet-4-5-20250929"`
56305646
5647 **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.
5648
56315649 High-performance model for agents and coding
56325650
5633 - `"claude-mythos-preview"`
5634
5635 **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.
5636
5637 New class of intelligence, strongest in coding and cybersecurity
5638
56395651 - `string`
56405652
56415653- `cache_control: optional CacheControlEphemeral or null`
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83968408 - `url: string`
83978409
8398 The final post-redirect URL the download was served from.
8399
8400 maxLength: 4096, pattern: ^[^\x00-\x1f\x7f-\x9f\u2028\u2029]*$
8401
8402 - `path: optional string or null`
8403
8404 Where the executor saved the file, on the executor's filesystem. Only included when another tool in the same environment can read the file at that path.
8405
8406 maxLength: 4096, pattern: ^[^\x00-\x1f\x7f-\x9f\u2028\u2029]*$
8407
8408 - `size_bytes: optional number or null`
8409
8410 The completed download's size.
8411
8412 minimum: 0
8413
8414### Browser State Change Download Failed
8415
8416- `BrowserStateChangeDownloadFailed object`
8417
8418 A file download that failed — or was cancelled — during this call.
8419
8420 - `type: "download_failed"`
8421
8422 - `download_id: string`
8423
8424 The caller-assigned identifier for this download, stable across the state changes reporting it.
8425
8426 minLength: 1, maxLength: 4096, pattern: ^[^\x00-\x1f\x7f-\x9f\u2028\u2029]*$
8427
8428 - `url: string`
8429
8430 The final post-redirect URL the download was served from.
8431
8432 maxLength: 4096, pattern: ^[^\x00-\x1f\x7f-\x9f\u2028\u2029]*$
8433
8434 - `error: optional string or null`
8435
8436 The failure or cancellation detail, when known.
8437
8438 maxLength: 4096, pattern: ^[^\x00-\x1f\x7f-\x9f\u2028\u2029]*$
8439
8410 The final post-redire
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