Sessions changedapi/beta/sessions
Nearest release: v2.1.301, published 11 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+95added
Lines−19removed
From line
15
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits27to this page, all time
The whole hunk
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from line 15
1515
1616- `"anthropic-version": optional string`
1717
18 The version of the Claude API you want to use.
19
20 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
21
1822- `"anthropic-beta": optional array of AnthropicBeta`
1923
20 Optional header to specify the beta version(s) you want to use.
24 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
2125
2226 - `string`
2327
from line 2721
27172721
27182722- `"anthropic-version": optional string`
27192723
2724 The version of the Claude API you want to use.
2725
2726 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
2727
27202728- `"anthropic-beta": optional array of AnthropicBeta`
27212729
2722 Optional header to specify the beta version(s) you want to use.
2730 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
27232731
27242732 - `string`
27252733
from line 4218
42104218
42114219- `"anthropic-version": optional string`
42124220
4221 The version of the Claude API you want to use.
4222
4223 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
4224
42134225- `"anthropic-beta": optional array of AnthropicBeta`
42144226
4215 Optional header to specify the beta version(s) you want to use.
4227 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
42164228
42174229 - `string`
42184230
from line 5701
56895701
56905702- `"anthropic-version": optional string`
56915703
5704 The version of the Claude API you want to use.
5705
5706 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
5707
56925708- `"anthropic-beta": optional array of AnthropicBeta`
56935709
5694 Optional header to specify the beta version(s) you want to use.
5710 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
56955711
56965712 - `string`
56975713
from line 7770
77547770
77557771- `"anthropic-version": optional string`
77567772
7773 The version of the Claude API you want to use.
7774
7775 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
7776
77577777- `"anthropic-beta": optional array of AnthropicBeta`
77587778
7759 Optional header to specify the beta version(s) you want to use.
7779 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
77607780
77617781 - `string`
77627782
from line 7931
79117931
79127932- `"anthropic-version": optional string`
79137933
7934 The version of the Claude API you want to use.
7935
7936 Read more about versioning and our version history [here](https://platform.claude.com/docs/en/api/versioning?sdk_languages=http).
7937
79147938- `"anthropic-beta": optional array of AnthropicBeta`
79157939
7916 Optional header to specify the beta version(s) you want to use.
7940 This endpoint is in beta: requests must send `managed-agents-2026-04-01` in this header.
79177941
79187942 - `string`
79197943
from line 8131
81078131
81088132 Next generation of intelligence for the hardest knowledge work and coding problems
81098133
8110 - `"claude-opus-5"`
8111
8112 Powerful intelligence for long-running agents and coding
8113
8114 - `"claude-opus-4-8"`
8115
8116 Powerful intelligence for long-running agents and coding
8117
8118 - `"claude-opus-4-7"`
8119
8120 Powerful intelligence for long-running agents and coding
8121
8122 - `"claude-opus-4-6"`
8123
8124 Powerful intelligence for long-running agents and coding
8125
8126 - `"claude-sonnet-4-6"`
8127
8128 Best combination of speed and intelligence
8129
8130 - `"claude-haiku-4-5"`
8131
8132 - `"claude-haiku-4-5-20251001"`
8133
8134 - `"claude-opus-4-5"`
8135
8136 Powerful intelligence for long-running agents and coding
8137
8138 - `"claude-opus-4-5-20251101"`
8139
8140 Powerful intelligence for long-running agents and coding
8141
8142 - `"claude-sonnet-4-5"`
8143
8144 **Deprecated**: Will reach end-of-life on November 30, 2026. Please migrate to claude-sonnet-5-5. Visit https://docs.anthropic.com/en/docs/resources/model-deprecations for more information.
8145
8146 High-performance model for agents and coding
8147
8148 - `"claude-sonnet-4-5-20250929"`
8149
8150 **Deprecated**: Will reach end-of-life on November 30, 2026. Please migrate to claude-sonnet-5-5. Visit https://docs.anthropic.com/en/docs/resourc
8134
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