[BUG] Cowork very slow - unusable.

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?

Approx 2 mins thinking time per response even at the start of a new session. Affects Sonnet and Opus. Unable to use the product today. https://status.claude.com/ reports no issues. Claude.ai desktop app responding normally, Cowork sessions taking 2+ mins per turn and all MCP connectors failing to connect. Issue is Cowork-specific, not inference.

What Should Happen?

Investigate the performance issue

Error Messages/Logs

Steps to Reproduce

Try Cowork from London

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

Cowork Version 1.6608.2 (ebf1a1)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Terminal.app (Win)

Additional Information

_No response_