Create Agent changedapi/beta/agents/create
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
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1313 - `string`
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15 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 38 more`
15 - `"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 41 more`
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1717 - `"message-batches-2024-09-24"`
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9797 - `"ce-user-management-2026-07-13"`
9898
99 - `"mid-conversation-output-config-2026-07-01"`
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101 - `"thinking-binding-controls-2026-08-01"`
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103 - `"mid-conversation-system-clear-at-2026-08-21"`
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99105## Body parameters
100106
101107- `model: BetaManagedAgentsModel or BetaManagedAgentsModelConfigParams`
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102108
103109 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
104110
105 - `BetaManagedAgentsModel = "claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more or string`
111 - `BetaManagedAgentsModel = "claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more or string`
106112
107113 The model that will power your agent.
108114
109115 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
110116
111 - `"claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more`
117 - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more`
112118
113119 The model that will power your agent.
114120
115121 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
116122
123 - `"claude-fable-5-1"`
124
125 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
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117127 - `"claude-sonnet-5"`
118128
119129 High-performance model for coding and agents
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792802
793803 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
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795 - `"claude-sonnet-5" or "claude-fable-5" or "claude-opus-5" or 10 more`
805 - `"claude-fable-5-1" or "claude-sonnet-5" or "claude-fable-5" or 11 more`
796806
797807 The model that will power your agent.
798808
799809 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
810
811 - `"claude-fable-5-1"`
812
813 Frontier intelligence for ambitious tasks across coding, scientific discovery, and enterprise workflows
800814
801815 - `"claude-sonnet-5"`
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