Batches changedapi/beta/messages/batches
Nearest release: v2.1.322, published 2 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+204added
Lines−2removed
From line
133
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits34to this page, all time
The whole hunk
from line 133, old and new numbered
/
This page is larger than the 256 KiB this site keeps, so one side of the diff below stops where the stored text does.
from line 133
133133
134134 - `"webhooks-2026-10-07"`
135135
136 - `"admin-user-sign-out-2026-10-08"`
137
136138 - `"message-threads-2026-08-12"`
137139
138140 - `"analytics-usage-cost-2026-08-24"`
from line 3150
31483150
31493151 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
31503152
3153 - `"claude-fable-5-2"`
3154
3155 Built for the most ambitious work in coding, enterprise workflows, and the sciences
3156
3157 - `"claude-mythos-5-2"`
3158
3159 Built for the most demanding cybersecurity and life sciences research, available through verification programs
3160
31513161 - `"claude-haiku-5-5"`
31523162
31533163 Fastest model for high-volume, real-time tasks
from line 3508
34983508 Accepted in `messages[].content` and not rendered into the prompt; not
34993509 validated against the request's `fallbacks` chain or top-level `model`.
35003510
3501 Echo the assistant turn back verbatim, including this block in its
3511 When you send the assistant turn back, keep this block in its
35023512 original position. The block marks the boundary between content produced
35033513 before and after a fallback hop, and the server relies on that boundary
35043514 to validate the turn: when thinking runs flank the boundary, omitting
from line 3515
35053515 the block merges them into one span the server cannot validate (the
35063516 request is rejected), and moving it into the middle of a single run is
35073517 likewise rejected; between non-thinking blocks the block's placement has
3508 no validation effect.
3518 no effect on thinking validation.
35093519
3520 Some blocks from before the turn's final `fallback` block must be left
3521 out when you send the turn back, and no `tool_result` is sent for a
3522 `tool_use` block you left out.
3523
3524 See the [refusals and fallback guide](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback?sdk_languages=http#continuing-the-conversation) to learn which blocks to keep.
3525
35103526 - `type: "fallback"`
35113527
35123528 - `from: BetaFallbackInfoParam`
from line 4635
46194635
46204636 - `"webhooks-2026-10-07"`
46214637
4638 - `"admin-user-sign-out-2026-10-08"`
4639
46224640 - `"message-threads-2026-08-12"`
46234641
46244642 - `"analytics-usage-cost-2026-08-24"`
from line 4935
49174935
49184936 - `"webhooks-2026-10-07"`
49194937
4938 - `"admin-user-sign-out-2026-10-08"`
4939
49204940 - `"message-threads-2026-08-12"`
49214941
49224942 - `"analytics-usage-cost-2026-08-24"`
from line 5244
52245244
52255245 - `"webhooks-2026-10-07"`
52265246
5247 - `"admin-user-sign-out-2026-10-08"`
5248
52275249 - `"message-threads-2026-08-12"`
52285250
52295251 - `"analytics-usage-cost-2026-08-24"`
from line 5535
55135535
55145536 - `"webhooks-2026-10-07"`
55155537
5538 - `"admin-user-sign-out-2026-10-08"`
5539
55165540 - `"message-threads-2026-08-12"`
55175541
55185542 - `"analytics-usage-cost-2026-08-24"`
from line 5718
56945718
56955719 - `"webhooks-2026-10-07"`
56965720
5721 - `"admin-user-sign-out-2026-10-08"`
5722
56975723 - `"message-threads-2026-08-12"`
56985724
56995725 - `"analytics-usage-cost-2026-08-24"`
from line 7240
72147240
72157241 - `enabled: optional boolean or null`
72167242
7217 Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
7218
7219 - `navigate: optional BetaBrowserNavigateConfig or null`
7220
7221 `navigate`'s config overrides.
7222
7223 - `defer_loading: optional boolean or null`
7224
7225 Defer loading for this member. Must resolve to the same value on every enabled member of the toolset.
7226
7227 - `enabled: optional boolean or null`
7228
7229 Whether this member is offered to the model. Default is per member, per the toolset's documentation. A member whose enabled resolves false is withheld from the served schema.
7230
7231 - `new_tab: optional BetaBrowserNewTabConfig or null`
7232
7233 `new_tab`'s config overrides.
7234
7235 - `defer_loading: optional boolean
7243
No line in this hunk matches that.