[BUG] TUI in Claude Code CLI instances using subscription via CLAUDE_CODE_OAUTH_TOKEN is misleading

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?

It is awesome that I can use claude setup-token to use my subscription Claude Code CLI instances installed on setups without a browser. However the TUI when I use the CLAUDE_CODE_OAUTH_TOKEN (from doing claude setup-token) is misleading as it is not clear if I am using my Claude subscription or an Anthropic API key.

Show here is a screenshot of my Claude Code CLI instance logged in my Claude subscription auth flow:

<img width="508" height="374" alt="Image" src="https://github.com/user-attachments/assets/67578e51-85d2-42c7-941d-233589afd65c" />

Note how the Claude Code banner shows "Claude Pro" (or respective subscription tier) and how a Current session usage bar is shown.

Now here is a screenshot of my other Claude Code CLI instance logged in with my CLAUDE_CODE_OAUTH_TOKEN:

<img width="509" height="280" alt="Image" src="https://github.com/user-attachments/assets/3eca147e-10bb-4d7e-ab9d-118f31b39e3a" />

Note how the Claude Code banner shows "Claude API" and how I can't track my current session.

What Should Happen?

The TUI should make it very clear that I am using my subscription when using the CLAUDE_CODE_OAUTH_TOKEN and I should be able to track my current session usage with a usage bar just like in Claude Code CLI instances logged in with the subscription auth flow.

Error Messages/Logs

Steps to Reproduce

1. Log into Claude Code CLI using subscription auth flow.
2. Note how the Claude Code banner shows "Claude Pro" (or respective subscription tier)
3. Run /usage command.
4. Note how a Current session usage bar is shown.
5. In another Claude Code CLI installation, use export CLAUDE_CODE_OAUTH_TOKEN=your-token (from running claude setup-token) to log in.
6. Note how the Claude Code banner shows "Claude API."
7. Run /usage command.
8. Note how I can't track my current session.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.119 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_