[BUG] huge performance drop in claude opus 4.6

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?

Claude performance dropped massive on the x20 plan. can't even distinct between localhost and production url anymore.

What Should Happen?

Should work with same performance as before.

Error Messages/Logs

Steps to Reproduce

run claude code

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.92

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_