Update Session changedapi/beta/sessions/update
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Lines−66removed
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14 Aug 2026
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Recorded edits12to this page, all time
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650650 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
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652 - `string`
652 - `"claude-sonnet-5-5" or "claude-opus-5-5" or "claude-fable-5-1" or 13 more`
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654 - `"claude-opus-5-5" or "claude-fable-5-1" or "claude-sonnet-5" or 12 more`
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656654 The model that will power your agent.
657655
658656 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
659657
658 - `"claude-sonnet-5-5"`
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660 Efficient model for coding and agents
661
660662 - `"claude-opus-5-5"`
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662664 Powerful intelligence for coding, knowledge work, and long-running agents
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668670 - `"claude-sonnet-5"`
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670 High-performance model for coding and agents
672 Efficient model for coding and agents
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672674 - `"claude-fable-5"`
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716718 - `"claude-sonnet-4-5-20250929"`
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718720 High-performance model for agents and coding
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722 - `string`
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720724 - `effort: optional BetaManagedAgentsEffortLow or BetaManagedAgentsEffortMedium or BetaManagedAgentsEffortHigh or 2 more`
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