Create a Message Batch changedapi/beta/messages/batches/create
Nearest release: v2.1.314, published 6 hours after 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+24added
Lines−0removed
From line
131
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits28to this page, all time
The whole hunk
from line 131, old and new numbered
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from line 131
131131
132132 - `"webhooks-2026-10-07"`
133133
134 - `"message-threads-2026-08-12"`
135
136 - `"analytics-usage-cost-2026-08-24"`
137
134138- `"anthropic-user-profile-id": optional string`
135139
136140 The user profile ID to attribute the requests in this batch to. Use when acting on behalf of a party other than your organization. Applies to every request in the batch; an individual request whose `user_profile_id` body field conflicts with this header is errored.
from line 4091
40874091 - `BetaThinkingConfigBetweenTools object`
40884092
40894093 - `BetaThinkingConfigAdaptive object`
4094
4095 - `thread: optional BetaMessageThreadParam or null`
4096
4097 Server-held conversation state (a Thread). `{"type": "create"}` asks the server to hold this conversation's state under the response's `id`; `{"type": "continue", "previous_message_id": ...}` resumes from a previous response so only the new turn's messages are sent. The response shape is unchanged.
4098
4099 - `BetaThreadCreateParams object`
4100
4101 Start holding conversation state under this response's `id`.
4102
4103 - `type: "create"`
4104
4105 - `BetaThreadContinueParams object`
4106
4107 Resume from the response named by `previous_message_id`.
4108
4109 - `type: "continue"`
4110
4111 - `previous_message_id: string`
4112
4113 The `id` of the previous response in this Thread.
40904114
40914115 - `tool_choice: optional BetaToolChoice`
40924116
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