Update Session changedapi/beta/sessions/update
Nearest release: v2.1.286, 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+158added
Lines−166removed
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First seen
14 Aug 2026
this site's first read of the page
Recorded edits15to this page, all time
The whole hunk
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2121
2222 - `string`
2323
24 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 45 more`
24 - `"message-batches-2024-09-24"`
2525
26 - `"message-batches-2024-09-24"`
26 - `"prompt-caching-2024-07-31"`
2727
28 - `"prompt-caching-2024-07-31"`
28 - `"computer-use-2024-10-22"`
2929
30 - `"computer-use-2024-10-22"`
30 - `"computer-use-2025-01-24"`
3131
32 - `"computer-use-2025-01-24"`
32 - `"pdfs-2024-09-25"`
3333
34 - `"pdfs-2024-09-25"`
34 - `"token-counting-2024-11-01"`
3535
36 - `"token-counting-2024-11-01"`
36 - `"token-efficient-tools-2025-02-19"`
3737
38 - `"token-efficient-tools-2025-02-19"`
38 - `"output-128k-2025-02-19"`
3939
40 - `"output-128k-2025-02-19"`
40 - `"files-api-2025-04-14"`
4141
42 - `"files-api-2025-04-14"`
42 - `"mcp-client-2025-04-04"`
4343
44 - `"mcp-client-2025-04-04"`
44 - `"mcp-client-2025-11-20"`
4545
46 - `"mcp-client-2025-11-20"`
46 - `"dev-full-thinking-2025-05-14"`
4747
48 - `"dev-full-thinking-2025-05-14"`
48 - `"interleaved-thinking-2025-05-14"`
4949
50 - `"interleaved-thinking-2025-05-14"`
50 - `"code-execution-2025-05-22"`
5151
52 - `"code-execution-2025-05-22"`
52 - `"extended-cache-ttl-2025-04-11"`
5353
54 - `"extended-cache-ttl-2025-04-11"`
54 - `"context-1m-2025-08-07"`
5555
56 - `"context-1m-2025-08-07"`
56 - `"context-management-2025-06-27"`
5757
58 - `"context-management-2025-06-27"`
58 - `"model-context-window-exceeded-2025-08-26"`
5959
60 - `"model-context-window-exceeded-2025-08-26"`
60 - `"skills-2025-10-02"`
6161
62 - `"skills-2025-10-02"`
62 - `"fast-mode-2026-02-01"`
6363
64 - `"fast-mode-2026-02-01"`
64 - `"output-300k-2026-03-24"`
6565
66 - `"output-300k-2026-03-24"`
66 - `"user-profiles-2026-03-24"`
6767
68 - `"user-profiles-2026-03-24"`
68 - `"user-profiles-2026-08-18"`
6969
70 - `"user-profiles-2026-08-18"`
70 - `"user-profiles-2026-09-04"`
7171
72 - `"user-profiles-2026-09-04"`
72 - `"advisor-tool-2026-03-01"`
7373
74 - `"advisor-tool-2026-03-01"`
74 - `"managed-agents-2026-04-01"`
7575
76 - `"managed-agents-2026-04-01"`
76 - `"cache-diagnosis-2026-04-07"`
7777
78 - `"cache-diagnosis-2026-04-07"`
78 - `"dreaming-2026-04-21"`
7979
80 - `"dreaming-2026-04-21"`
80 - `"thinking-token-count-2026-05-13"`
8181
82 - `"thinking-token-count-2026-05-13"`
82 - `"server-side-fallback-2026-06-01"`
8383
84 - `"server-side-fallback-2026-06-01"`
84 - `"server-side-fallback-2026-07-01"`
8585
86 - `"server-side-fallback-2026-07-01"`
86 - `"fallback-credit-2026-06-01"`
8787
88 - `"fallback-credit-2026-06-01"`
88 - `"fallback-credit-2026-07-01"`
8989
90 - `"fallback-credit-2026-07-01"`
90 - `"agent-memory-2026-07-22"`
9191
92 - `"agent-memory-2026-07-22"`
92 - `"mid-conversation-tool-changes-2026-07-01"`
9393
94 - `"mid-conversation-tool-changes-2026-07-01"`
94 - `"compact-2026-01-12"`
9595
96 - `"compact-2026-01-12"`
96 - `"computer-use-2025-11-24"`
9797
98 - `"computer-use-2025-11-24"`
98 - `"mcp-tunnels-2026-06-22"`
9999
100 - `"mcp-tunnels-2026-06-22"`
100 - `"structured-outputs-2025-11-13"`
101101
102 - `"structured-outputs-2025-11-13"`
102 - `"task-budgets-2026-03-13"`
103103
104 - `"task-budgets-2026-03-13"`
104 - `"thinking-display-updates-2026-08-18"`
105105
106 - `"thinking-display-updates-2026-08-18"`
106 - `"ce-user-management-2026-07-13"`
107107
108 - `"ce-user-management-2026-07-13"`
108 - `"mid-conversation-output-config-2026-07-01"`
109109
110 - `"mid-conversation-output-config-2026-07-01"`
110 - `"thinking-binding-controls-2026-08-01"`
111111
112 - `"thinking-binding-controls-2026-08-01"`
112 - `"mid-conversation-system-clear-at-2026-08-21"`
113113
114 - `"mid-conversation-system-clear-at-2026-08-21"`
114 - `"compact-2026-09-04"`
115115
116 - `"compact-2026-09-04"`
116 - `"inline-tools-2026-09-15"`
117117
118 - `"inline-tools-2026-09-15"`
118 - `"mcp-client-2026-09-15"`
119119
120 - `"mcp-client-2026-09-15"`
121
122120- `"anthropic-workspace-id": optional string`
123121
124122 Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).
from line 647
649647
650648 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
651649
652 - `"claude-sonnet-5-5" or "claude-opus-5-5" or "claude-fable-5-1" or 13 more`
650 - `"claude-sonnet-5-5"`
653651
654 The model that will power your agent.
652 Efficient model for coding and agents
655653
656 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
654 - `"claude-opus-5-5"`
657655
658 - `"claude-sonnet-5-5"`
656 Powerful intelligence for coding, knowledge work, and long-running agents
659657
660 Efficient model for coding and agents
658 - `"claude-fable-5-1"`
661659
662 - `"claude-opus-5-5"`
660 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
663661
664 Powerful intelligence for coding, knowledge work, and long-running agents
662 - `"claude-sonnet-5"`
665663
666 - `"claude-fable-5-1"`
664 Efficient model for coding and agents
667665
668 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
666 - `"claude-fable-5"`
669667
670 - `"claude-sonnet-5"`
668 Next generation of intelligence for the hardest knowledge work and coding problems
671669
672 Efficient model for coding and agents
670 - `"claude-opus-5"`
673671
674 - `"claude-fable-5"`
672 Powerful intelligence for long-running agents and coding
675673
676 Next generation of intelligence for the hardest knowledge work and coding problems
674 - `"claude-opus-4-8"`
677675
678 - `"claude-opus-5"`
676 Powerful intelligence for long-running agents and coding
679677
680 Powerful intelligence for long-running agents and coding
678 - `"claude-opus-4-7"`
681679
682 - `"claude-opus-4-8"`
680 Powerful intelligence for long-running agents and coding
683681
684 Powerful intelligence for long-running agents and coding
682 - `"claude-opus-4-6"`
685683
686 - `"claude-opus-4-7"`
684 Powerful intelligence for long-running agents and coding
687685
688 Powerful intelligence for long-running agents and coding
686 - `"claude-sonnet-4-6"`
689687
690 - `"claude-opus-4-6"`
688 Best combination of speed and intelligence
691689
692 Powerful intelligence for long-running agents and coding
690 - `"claude-haiku-4-5"`
693691
694 - `"claude-sonnet-4-6"`
692 Fastest model with near-frontier intelligence
695693
696 Best combination of speed and intelligence
694 - `"claude-haiku-4-5-20251001"`
697695
698 - `"claude-haiku-4-5"`
696 Fastest model with near-frontier intelligence
699697
700 Fastest model with near-frontier intelligence
698 - `"claude-opus-4-5"`
701699
702 - `"claude-haiku-4-5-20251001"`
700 Powerful intelligence for long-running agents and coding
703701
704 Fastest model with near-frontier intelligence
702 - `"claude-opus-4-5-20251101"`
705703
706 - `"claude-opus-4-5"`
704 Powerful intelligence for long-running agents and coding
707705
708 Powerful intelligence for long-running agents and coding
706 - `"claude-sonnet-4-5"`
709707
710 - `"claude-opus-4-5-20251101"`
708 High-performance model for agents and coding
711709
712 Powerful intelligence for long-running agents and coding
710 - `"claude-sonnet-4-5-20250929"`
713711
714 - `"claude-sonnet-4-5"`
715
716 High-performance model for agents and coding
717
718 - `"claude-sonnet-4-5-20250929"`
719
720 High-performance model for agents and coding
712 High-performance model for agents and coding
721713
722714 - `string`
723715
No line in this hunk matches that.