[BUG]

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?

always API Error: 400 The content[].thinking in the thinking mode must be passed back to the API.

What Should Happen?

no this Error

Error Messages/Logs

Steps to Reproduce

I used deepseek-v4-pro

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.153 (Claude Code)

Claude Code Version

2.1.153 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_