Create a Message Batch changedapi/messages/batches/create
Nearest release: v2.1.301, published 11 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.
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First seen
14 Aug 2026
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Recorded edits22to this page, all time
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from line 1293, old and new numbered
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12941294 - `"standard_only"`
12951295
1296 - `speed: optional "standard" or "fast" or null`
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1298 The inference speed mode for this request. `"fast"` enables high output-tokens-per-second inference.
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1300 Some models require the `fast-mode-2026-02-01` beta header for any `speed` value. See [fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode?sdk_languages=http) for which models.
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1302 - `"standard"`
1303
1304 - `"fast"`
1305
12961306 - `stop_sequences: optional array of string`
12971307
12981308 Custom text sequences that will cause the model to stop generating.
No line in this hunk matches that.