[BUG] API Error 400 persists after claiming $100 third-party usage credit

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Description

After Anthropic's billing change that separates third-party app usage from plan limits, one of my Claude Code instances returns a 400 error even after claiming
the $100 credit at claude.ai/settings/usage.

Steps to Reproduce

1. Have two Claude Code instances running on the same account
2. One instance works fine, the other returns the error below
3. Claimed the $100 credit as instructed in the error message
4. Restarted the failing instance — same error persists

Error

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"Third-party apps now draw from your extra usage, not your plan limits. We've
added a $100 credit to get you started. Claim it at claude.ai/settings/usage and keep going."},"request_id":"req_011CZr3bF6jba1z3PfadLFfL"}

Expected Behavior

After claiming the credit, Claude Code should resume working.

Environment

• Platform: macOS (Darwin 25.3.0)
• Platform: Ubuntu (instance having the issue on)
• Both instances on the same account
• One instance works, the other does not

Request ID

req_011CZr3bF6jba1z3PfadLFfL

What Should Happen?

should be able to use Claude Code in this instance

Error Messages/Logs

Steps to Reproduce

Steps to Reproduce

1. Have two Claude Code instances running on the same account
2. One instance works fine, the other returns the error below
3. Claimed the $100 credit as instructed in the error message
4. Restarted the failing instance — same error persists

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.96

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_