[BUG] Model selection issue

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?

❯ /login
⎿ Login successful

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

❯ /model claude-opus-4-6
⎿ Model 'claude-opus-4-6' not found

❯ /model opus
⎿ Set model to claude-opus-4-6-thinking

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

What Should Happen?

It should resolve the proper model automatically. It's like how can one use claude code if it cannot select a model.

Error Messages/Logs

❯ /login
  ⎿  Login successful

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

❯ /model claude-opus-4-6
  ⎿  Model 'claude-opus-4-6' not found

❯ /model opus
  ⎿  Set model to claude-opus-4-6-thinking

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

Steps to Reproduce

❯ /login
⎿ Login successful

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

❯ /model claude-opus-4-6
⎿ Model 'claude-opus-4-6' not found

❯ /model opus
⎿ Set model to claude-opus-4-6-thinking

❯ I want you to read this sub project and understand it.

● There's an issue with the selected model (claude-opus-4-6-thinking). It may not exist or you may not have access to it. Run /model to pick a different model.

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.81

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_