Models and effort levels changedthird-party/claude-desktop/models
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Upstream edited this page at 10 Nov 2026 18:30 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 10 Nov 2026 18:37 UTC.
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6767* **`model-selection.txt`**: the entry's `behavesAs` line says whether the picker uses the value. `(the picker offers that model's options)` means it does.
6868* **`managed-config.txt`**: `behavesAs dropped: not an accepted value` under `Parse errors` means the value isn't a model ID. Enter a full ID such as `claude-sonnet-5`, not a family name such as `sonnet`.
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70Without `behavesAs`, users can't change an unrecognized model's effort level. Its conversations and sessions never run above the `maxEffort` on its entry. When it's the default model, they run at [`defaultModelEffort`](https://claude.com/docs/third-party/claude-desktop/configuration#defaultmodeleffort), up to that cap. With only `maxEffort` set, they run at that cap.
70Without `behavesAs`, users can't change an unrecognized model's effort level. Its conversations and sessions never run above the `maxEffort` on its entry. When it's the default model, its new conversations and sessions start at [`defaultModelEffort`](https://claude.com/docs/third-party/claude-desktop/configuration#defaultmodeleffort), up to that cap. With only `maxEffort` set, they run at that cap.
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7272## Start every conversation on the default model
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