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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Developer Platform 22 Oct 2026
One change · api

Sessions changedapi/beta/sessions

Nearest release: v2.1.309, published 2 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+38added
Lines−38removed
From line 2,406 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 2406, old and new numbered
/
lines

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 2406
24062406```bash
24072407curl https://api.anthropic.com/v1/sessions \
24082408 -H 'Content-Type: application/json' \
2409 -H 'anthropic-version: 2023-06-01' \
2409 -H 'anthropic-version: 2026-10-21' \
24102410 -H 'anthropic-beta: managed-agents-2026-04-01' \
2411 -H "X-Api-Key: $ANTHROPIC_API_KEY" \
2411 -H "Authorization: Bearer $ANTHROPIC_API_KEY" \
24122412 -d '{
24132413 "agent": "agent_011CZkYpogX7uDKUyvBTophP",
24142414 "environment_id": "env_011CZkZ9X2dpNyB7HsEFoRfW",
from line 3997
39973997 
39983998```bash
39993999curl https://api.anthropic.com/v1/sessions \
4000 -H 'anthropic-version: 2023-06-01' \
4000 -H 'anthropic-version: 2026-10-21' \
40014001 -H 'anthropic-beta: managed-agents-2026-04-01' \
4002 -H "X-Api-Key: $ANTHROPIC_API_KEY"
4002 -H "Authorization: Bearer $ANTHROPIC_API_KEY"
40034003```
40044004 
40054005#### Response (200)
from line 5488
54885488 
54895489```bash
54905490curl https://api.anthropic.com/v1/sessions/$SESSION_ID \
5491 -H 'anthropic-version: 2023-06-01' \
5491 -H 'anthropic-version: 2026-10-21' \
54925492 -H 'anthropic-beta: managed-agents-2026-04-01' \
5493 -H "X-Api-Key: $ANTHROPIC_API_KEY"
5493 -H "Authorization: Bearer $ANTHROPIC_API_KEY"
54945494```
54955495 
54965496#### Response (200)
from line 7556
75567556```bash
75577557curl https://api.anthropic.com/v1/sessions/$SESSION_ID \
75587558 -H 'Content-Type: application/json' \
7559 -H 'anthropic-version: 2023-06-01' \
7559 -H 'anthropic-version: 2026-10-21' \
75607560 -H 'anthropic-beta: managed-agents-2026-04-01' \
7561 -H "X-Api-Key: $ANTHROPIC_API_KEY" \
7561 -H "Authorization: Bearer $ANTHROPIC_API_KEY" \
75627562 -d '{
75637563 "title": "Order #1234 inquiry"
75647564 }'
from line 7913
79137913```bash
79147914curl https://api.anthropic.com/v1/sessions/$SESSION_ID \
79157915 -X DELETE \
7916 -H 'anthropic-version: 2023-06-01' \
7916 -H 'anthropic-version: 2026-10-21' \
79177917 -H 'anthropic-beta: managed-agents-2026-04-01' \
7918 -H "X-Api-Key: $ANTHROPIC_API_KEY"
7918 -H "Authorization: Bearer $ANTHROPIC_API_KEY"
79197919```
79207920 
79217921#### Response (200)
from line 8133
81338133 
81348134 - `"claude-fable-5-1"`
81358135 
8136 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
8137 
8138 - `"claude-sonnet-5"`
8139 
8140 
8136 Frontier intelligence for ambitious tasks across coding, scientific discovery, an
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