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281281* **Plan**: All plans.
282282* **Organization**: on Team and Enterprise, auto mode is available by default. Administrators can turn it off for the organization by setting `permissions.disableAutoMode` to `"disable"` in [managed settings](/docs/en/managed-settings).
283* **Model**: on the Anthropic API and [Claude Platform on AWS](/docs/en/claude-platform-on-aws), Claude Opus 4.6 or later, Sonnet 4.6 or later, or [Fable 5](/docs/en/model-config#work-with-fable-5). On Amazon Bedrock, Google Cloud's Agent Platform, Microsoft Foundry, and signed-in [Claude apps gateway](/docs/en/claude-apps-gateway) sessions, only Claude Sonnet 5, Opus 4.7 or later, and Fable 5. Older models, including Sonnet 4.5, Opus 4.5, Haiku, and claude-3 models, are not supported on any provider.
283* **Model**: on the Anthropic API and [Claude Platform on AWS](/docs/en/claude-platform-on-aws), Claude Opus 4.6 or later, Sonnet 4.6 or later, or a [Fable model](/docs/en/model-config#work-with-fable). On Amazon Bedrock, Google Cloud's Agent Platform, Microsoft Foundry, and signed-in [Claude apps gateway](/docs/en/claude-apps-gateway) sessions, only Claude Sonnet 5, Opus 4.7 or later, and the Fable models. Older models, including Sonnet 4.5, Opus 4.5, Haiku, and claude-3 models, are not supported on any provider.
284284* **Provider**: available by default on the Anthropic API, Claude Platform on AWS, Amazon Bedrock, Google Cloud's Agent Platform, Microsoft Foundry, and signed-in Claude apps gateway sessions.
285285
286286If Claude Code reports auto mode as unavailable, first check these requirements and whether any settings file sets [`disableAutoMode`](/docs/en/settings-reference#disableautomode). Anthropic may also have turned auto mode off server-side, or the server may have rejected auto mode for your account. A session that received either answer keeps auto mode off until the session ends, so start a new session later.
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293293 Auto mode on Bedrock, Agent Platform, or Foundry
294294</h3>
295295
296On [Amazon Bedrock](/docs/en/amazon-bedrock), [Google Cloud's Agent Platform](/docs/en/google-vertex-ai), [Microsoft Foundry](/docs/en/microsoft-foundry), and signed-in [Claude apps gateway](/docs/en/claude-apps-gateway) sessions, auto mode appears in the `Shift+Tab` cycle by default. Appearing in the cycle doesn't change the permission mode a session starts in: on these providers, terminal sessions start in your [`defaultMode`](/docs/en/settings-reference#permissions-defaultmode), which is Manual unless you change it, and conversations in the [VS Code extension](/docs/en/vs-code) start in Manual unless `claudeCode.initialPermissionMode` or a mode you picked in the extension sets one. Only Claude Sonnet 5, Opus 4.7 or later, and Fable 5 are supported on these providers.
296On [Amazon Bedrock](/docs/en/amazon-bedrock), [Google Cloud's Agent Platform](/docs/en/google-vertex-ai), [Microsoft Foundry](/docs/en/microsoft-foundry), and signed-in [Claude apps gateway](/docs/en/claude-apps-gateway) sessions, auto mode appears in the `Shift+Tab` cycle by default. Appearing in the cycle doesn't change the permission mode a session starts in: on these providers, terminal sessions start in your [`defaultMode`](/docs/en/settings-reference#permissions-defaultmode), which is Manual unless you change it, and conversations in the [VS Code extension](/docs/en/vs-code) start in Manual unless `claudeCode.initialPermissionMode` or a mode you picked in the extension sets one. Only Claude Sonnet 5, Opus 4.7 or later, and the Fable models are supported on these providers.
297297
298298To make auto mode the default starting permission mode, set `"permissions": {"defaultMode": "auto"}` in user or managed settings. In sessions the VS Code extension starts, select **Auto** from the mode indicator instead. [Switch permission modes](#switch-permission-modes) covers what outranks that pick.
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448448 </Accordion>
449449
450450 <Accordion title="Cost and latency">
451 The classifier runs on Claude Sonnet 5 by default rather than on your `/model` selection. A classifier model that Anthropic configures server-side takes precedence over that default. When your session's model is Claude Sonnet 4.6, or when [`availableModels`](/docs/en/model-config#restrict-model-selection) excludes Sonnet 5, the classifier runs on the session's model instead, or on an Opus model when the session runs on [Fable 5](/docs/en/model-config#work-with-fable-5); on providers other than the Anthropic API, that Opus fallback is the provider's default Opus model.
451 The classifier runs on Claude Sonnet 5 by default rather than on your `/model` selection. A classifier model that Anthropic configures server-side takes precedence over that default. When your session's model is Claude Sonnet 4.6, or when [`availableModels`](/docs/en/model-config#restrict-model-selection) excludes Sonnet 5, the classifier runs on the session's model instead, or on an Opus model when the session runs on a [Fable model](/docs/en/model-config#work-with-fable); on providers other than the Anthropic API, that Opus fallback is the provider's default Opus model.
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453453 The session's first auto-mode request validates the Sonnet 5 default: if the request succeeds, Sonnet 5 stays the session's classifier model, and if it fails because the model isn't available, the session uses the fallback instead. After that validation settles, the classifier's model doesn't change for the session.
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