### Preflight Checklist - [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) 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? ### Error ``` API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"`clear_thinking_20251015` strategy requires `thinking` to

[BUG] Not able to run claude code without thinking mode

Status Fixed / completed

Maintainer reply None cached

Activity 6 comments · opened Nov 17, 2025 · closed Nov 17, 2025

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?

Error

 API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"`clear_thinking_20251015` strategy requires `thinking` to be 
     enabled"},"request_id":"req_011CVCvpKEJmX4g6Hv2rQtGU"}

When Im trying to use CC without thinking mode enabled, Im getting the above error. No solutions around to resolve this. It was all working fine suddenly it started happening

Claude version- Claude Code v2.0.36

What Should Happen?

Should be able to use CC without thinking too.

Error Messages/Logs

Steps to Reproduce

Thinking mode is set to off
Type any prompt
It throws the error

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.0.36

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_

View original on GitHub ↗

6 Comments

github-actions[bot] · 11 months ago

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Found 3 possible duplicate issues:

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🤖 Generated with Claude Code

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KilimcininKorOglu · 11 months ago

can you add "alwaysThinkingEnabled": false to your .claude/settings.json?

mrded · 11 months ago

Make sure you run on latest Claude (=>2.0.42)

brew upgrade --cask claude-code
brew upgrade claude-code

szwang · 11 months ago

@Amansaxena001 this is fixed as of version 2.0.37. Let us know if you still have any issues. So sorry for the friction here, and thank you for reporting!

Amansaxena001 · 11 months ago

yes its resolved v2.0.42

github-actions[bot] · 10 months ago

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.