Update Agent changedapi/beta/agents/update
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.
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Lines−4removed
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First seen
14 Aug 2026
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Recorded edits28to this page, all time
The whole hunk
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1717 - `string`
1818
19 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 38 more`
19 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 41 more`
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2121 - `"message-batches-2024-09-24"`
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100100
101101 - `"ce-user-management-2026-07-13"`
102102
103 - `"mid-conversation-output-config-2026-07-01"`
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105 - `"thinking-binding-controls-2026-08-01"`
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107 - `"mid-conversation-system-clear-at-2026-08-21"`
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103109## Body parameters
104110
105111- `description: optional string or null`
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134140
135141 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.
136142
137 - `BetaManagedAgentsModel = "claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more or string`
143 - `BetaManagedAgentsModel = "claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more or string`
138144
139145 The model that will power your agent.
140146
141147 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
142148
143 - `"claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more`
149 - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more`
144150
145151 The model that will power your agent.
146152
147153 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
148154
155 - `"claude-fable-5-1"`
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157 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
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149159 - `"claude-sonnet-5"`
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151161 High-performance model for coding and agents
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802812
803813 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
804814
805 - `"claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more`
815 - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more`
806816
807817 The model that will power your agent.
808818
809819 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
820
821 - `"claude-fable-5-1"`
822
823 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
810824
811825 - `"claude-sonnet-5"`
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