Update Agent changedapi/beta/agents/update
Nearest release: v2.1.281, published an hour 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+16added
Lines−4removed
From line
23
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits11to this page, all time
The whole hunk
from line 23, old and new numbered
/
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2323
2424 - `string`
2525
26 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 43 more`
26 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 45 more`
2727
2828 - `"message-batches-2024-09-24"`
2929
from line 117
117117
118118 - `"compact-2026-09-04"`
119119
120 - `"inline-tools-2026-09-15"`
121
122 - `"mcp-client-2026-09-15"`
123
120124- `"anthropic-workspace-id": optional string`
121125
122126 Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).
from line 161
157161
158162 Model identifier. Accepts the [model string](https://platform.claude.com/docs/en/about-claude/models/overview#latest-models-comparison), e.g. `claude-opus-5`, or a `model_config` object for additional configuration control. Omit to preserve. Cannot be cleared.
159163
160 - `BetaManagedAgentsModel = "claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more or string`
164 - `BetaManagedAgentsModel = "claude-opus-5-5" or "claude-fable-5-1" or "claude-sonnet-5" or 12 more or string`
161165
162166 The model that will power your agent.
163167
164168 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
165169
166 - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more`
170 - `"claude-opus-5-5" or "claude-fable-5-1" or "claude-sonnet-5" or 12 more`
167171
168172 The model that will power your agent.
169173
170174 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
171175
176 - `"claude-opus-5-5"`
177
178 Powerful intelligence for coding, knowledge work, and long-running agents
179
172180 - `"claude-fable-5-1"`
173181
174182 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
from line 895
887895
888896 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
889897
890 - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more`
898 - `"claude-opus-5-5" or "claude-fable-5-1" or "claude-sonnet-5" or 12 more`
891899
892900 The model that will power your agent.
893901
894902 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
903
904 - `"claude-opus-5-5"`
905
906 Powerful intelligence for coding, knowledge work, and long-running agents
895907
896908 - `"claude-fable-5-1"`
897909
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