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How it works

  1. Radius launches its bundled Claude runtime with your normal Claude home and shell environment.
  2. Claude reads your login plus user, project, and local settings.
  3. Radius requests the available models.
  4. Claude uses its native default. Your Radius selection overrides it for the conversation.
If you need to sign in, use the Claude sign-in action in Radius. Radius uses the same Claude home as the regular CLI.

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Configuration cases

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Cloud providers

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Google Cloud Vertex AI

Set CLAUDE_CODE_USE_VERTEX=1, then configure your Google Cloud project, region, credentials, and any model mappings through Claude’s supported environment and settings. Select CLI in Radius.

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Microsoft Foundry

Set CLAUDE_CODE_USE_FOUNDRY=1, then configure your Foundry resource, credentials, and model deployments through Claude’s supported environment and settings. Select CLI in Radius.

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Amazon Bedrock

Set CLAUDE_CODE_USE_BEDROCK=1, then configure your AWS profile or credentials, region, and any model mappings through Claude’s supported environment and settings. Select CLI in Radius.