Make Opus the Pro and Team default

default model setting

The behavior of default depends on your account type:

• Pro, Max, Team, Enterprise, and Anthropic API: defaults to Opus 5.5
• Claude Platform on AWS, Amazon Bedrock, and Google Cloud's Agent Platform: defaults to Opus 5.5
• Microsoft Foundry: defaults to Sonnet 4.5

Before v2.1.280, default resolved to Sonnet 5 on Pro and Team Standard, and to Opus 5 on Max, Team Premium, Enterprise, the Anthropic API, Claude Platform on AWS, Amazon Bedrock, and Google Cloud's Agent Platform from v2.1.219. Before v2.1.219, default resolved to Opus 4.8 on the Anthropic API, Max, Team Premium, and Enterprise pay-as-you-go from v2.1.154, and on Claude Platform on AWS, Amazon Bedrock, and Google Cloud's Agent Platform from v2.1.207. Before v2.1.207, default resolved to Opus 4.7 on Claude Platform on AWS and to Sonnet 4.5 on Amazon Bedrock and Google Cloud's Agent Platform.

When an admin has set an organization default model, default resolves to that model instead of the account-type default above. Requires Claude Code v2.1.196 or later. default can also resolve to the model you set with ANTHROPIC_DEFAULT_MODEL, under the conditions listed in its section.

When managed settings enforce the allowlist for the Default model and the account-type default is not in availableModels, default resolves to the enforced Default instead of the account-type default above. When both apply, the organization default replaces the account-type default first and enforcement then applies to it: an allowlisted organization default is kept, while one outside the list resolves to the enforced Default.

Fable models are not the account-type default on any plan or provider. Choosing one with /model saves it as the selected model in your user settings, so later sessions start on it. For the one-time change Claude Code makes to a saved Fable 5 selection in v2.1.257, see Work with Fable.