[BUG] thinking mode in 2.1.63 does not work for models like qwen model

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 Code v2.1.63
▝▜█████▛▘ qwen3.5-plus · API Usage Billing
▘▘ ▝▝ ~/Documents/code/pixel-agents

/model to try Opus 4.6

❯ 看起来，恢复了
⎿  API Error: 400 {"error":{"code":"invalid_parameter_error","message":"event:error\ndata:{\"code\":\"InvalidParameter\",\"message\":\"Only 'enabled' and 'disabled' are supported for thinking; 'adaptive' is not
supported.\",\"request_id\":\"647ffb95-be8b-98b9-9017-2c3f9e219c68\"}\n\n","param":null,"type":"invalid_request_error"},"request_id":"3868c59c-5e1a-9f87-8c1c-ef5485a3c798"}

What Should Happen?

should work as 2.1.62, wont block use.

Error Messages/Logs

API Error: 400 {"error":{"code":"invalid_parameter_error","message":"event:error\ndata:{\"code\":\"InvalidParameter\",\"message\":\"Only 'enabled' and 'disabled' are supported for thinking; 'adaptive' is not
     supported.\",\"request_id\":\"647ffb95-be8b-98b9-9017-2c3f9e219c68\"}\n\n","param":null,"type":"invalid_request_error"},"request_id":"3868c59c-5e1a-9f87-8c1c-ef5485a3c798"}

Steps to Reproduce

just config model does not support adaptive thinking mode

Claude Model

Other

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.62

Claude Code Version

2.1.63

Platform

Other

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_