[BUG] New version burns through all tokens in minutes, doesn't allow Opus 4.6 use, doesn't allow downgrade.

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?

When I use Claude Code v2.1.112, it uses Max tokens in minutes. 1% per prompt. The prior version could be used for hours, on opus 4.6. The new version doesn't allow you to downgrade to Opus 4.6, it's not in the model list.

What Should Happen?

It should allow you to use Opus 4.6, which would use fewer tokens.

Error Messages/Logs

Steps to Reproduce

Install claude code in vs code, leave it on Opus 4.7, and use basic prompts in a new context window. Check usage in Claude max. The session usage goes up by 1% for every single prompt, even very basic ones.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.69

Claude Code Version

2.1.112

Platform

Other

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_