[BUG] API key not actually used when already logged in with Claude Subscription

[dvarnai]

Environment

• Platform (select one):
  • [x] Anthropic API
  • [ ] AWS Bedrock
  • [ ] Google Vertex AI
  • [ ] Other:
• Claude CLI version: 1.0.11
• Operating System: macOS 15.0.1
• Terminal: iTerm2 / Jetbrains

Bug Description

API key override is ignored when already logged in with Claude Subscription.

Steps to Reproduce

1. Log in with Claude Subscription
2. Run Claude with API key override
3. Use Claude

Expected Behavior

The usage is charged against the API key

Actual Behavior

Claude Code continues using Claude Subscription instead of the provided API key

Additional Context

Claude is detecting the API key as expected:

/cost still shows that the session didn't cost anything:

Also confirmed on the Anthropic Console that usage wasn't charged against the API key.

/logout is not available when API key is provided, to log out of my subscription I had to run claude code again without API key.

[ant-kurt]

Thanks for the report - we have repro on this and are working through this along with the other login-related issues (see #1582).

@dvarnai if you have a preference on the UX for handling these conflicts (see most recent comment on last issue), feel free to chime in!

[github-actions[bot]]

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