Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
One change · api

Events changed

api/beta/sessions/events

Nearest release: v2.1.258, published an hour 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+43added
Lines−9removed
From line 44 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits12to this page, all time

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from line 44
4444 
4545- `order: optional "asc" or "desc"`
4646 
47 Sort direction for results, ordered by the event's `processed_at`. Defaults to asc (chronological).
47 Sort direction for results, ordered by the event's `processed_at`. Defaults to `asc` (chronological).
4848 
4949 - `"asc"`
5050 
from line 52
5252 
5353- `page: optional string`
5454 
55 Opaque pagination cursor from a previous response's next_page.
55 Opaque pagination cursor from a previous response's `next_page`.
5656 
5757- `types: optional array of string`
5858 
from line 66
6666 
6767 - `string`
6868 
69 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 38 more`
69 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 41 more`
7070 
7171 - `"message-batches-2024-09-24"`
7272 
from line 150
150150 
151151 - `"ce-user-management-2026-07-13"`
152152 
153 - `"mid-conversation-output-config-2026-07-01"`
154 
155 - `"thinking-binding-controls-2026-08-01"`
156 
157 - `"mid-conversation-system-clear-at-2026-08-21"`
158 
153159### Returns
154160 
155161- `data: optional array of BetaManagedAgentsSessionEvent`
from line 1628
16221628 
16231629 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
16241630 
1625 - `"claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more`
1631 - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more`
16261632 
16271633 The model that will power your agent.
16281634 
16291635 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
16301636 
1637 - `"claude-fable-5-1"`
1638 
1639 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
1640 
16311641 - `"claude-sonnet-5"`
16321642 
16331643 High-performance model for coding and agents
from line 2351
23412351 
23422352 - `string`
23432353 
2344 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 38 more`
2354 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 41 more`
23452355 
23462356 - `"message-batches-2024-09-24"`
23472357 
from line 2435
24252435 
24262436 - `"ce-user-management-2026-07-13"`
24272437 
2438 - `"mid-conversation-output-config-2026-07-01"`
2439 
2440 - `"thinking-binding-controls-2026-08-01"`
2441 
2442 - `"mid-conversation-system-clear-at-2026-08-21"`
2443 
24282444### Body parameters
24292445 
24302446- `events: array of BetaManagedAgentsEventParams`
from line 3322
33063322 
33073323 - `string`
33083324 
3309 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 38 more`
3325 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 41 more`
33103326 
33113327 - `"message-batches-2024-09-24"`
33123328 
from line 3406
33903406 
33913407 - `"ce-user-management-2026-07-13"`
33923408 
3409 - `"mid-conversation-output-config-2026-07-01"`
3410 
3411 - `"thinking-binding-controls-2026-08-01"`
3412 
3413 - `"mid-conversation-system-clear-at-2026-08-21"`
3414 
33933415### Returns
33943416 
33953417- `BetaManagedAgentsStreamSessionEvents = BetaManagedAgentsUserMessageEvent or BetaManagedAgentsUserInterruptEvent or BetaManagedAgentsUserToolConfirmationEvent or 34 more`
from line 4884
48624884 
48634885 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
48644886 
4865 - `"claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more`
4887 - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more`
48664888 
48674889 The model that will power your agent.
48684890 
48694891 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
48704892 
4893 - `"claude-fable-5-1"`
4894 
4895 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
4896 
48714897 - `"claude-sonnet-5"`
48724898 
48734899 High-performance model for coding and agents
from line 9335
93099335 
93109336 - `explanation: string`
93119337 
9312 Human-readable explanation of the verdict. For `needs_revision`, describes which criteria failed and why.
9313 
9314 - `iteration: number`
9315 
9316 0-indexed revision cycle, matching the corresponding `span.outcome_evaluation_start`.
9317 
9318 format: int32
9319 
9320 - `outcome_evaluation_start_id: string`
9321 
9322 The id of the corresponding `span.outcome_evaluation_start` event.
9323 
9324 - `outcome_id: string`
9325 
9326 The `outc_` ID of the outcome being evaluated.
9327 
9328 - `processed_at: string`
9329 
9330 A timestamp in RFC 3339 format
9331 
9332 format: date-time
9333 
9334 - `result: string`
9335 
9336 Evaluation verdict. 'satisfied': criteria met, session goes idle. 'needs_revision': criteria not met, another revision cycle follows. 'max_iterations_reached': evaluation budget exhausted with criteria still unmet — one final acknowledgment turn follows before the s
9338 Human-readable explanation of the verdict. For `need