Cursor model thinking bug

Bug Reports
1

Describe the Bug

I opened a conversation. If I first use gmini-2.5-pro (thinking) to analyze the project, and then use claude4 (thinking) to develop the project, claude4 does not have a thinking process.If I open a new conversation again and first choose claude4 (thinking) for analysis, understanding, and development, it will display the thought process.

Steps to Reproduce

  1. I open a new conversation and choose gmini-2.5-pro (thinking) to understand and analyze the project.

  2. After the analysis, I select claude4 (thinking) to develop the project, and I find that claude4’s response does not show any thought process.

  3. If I open a new conversation again and first choose claude4 (thinking) for analysis, understanding, and development, it will display the thought process.

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

version: 1.1.5 (Universal)
Submit: 1.96.2
Date: ef5eeb47a684b4c217dfaf0463aa7ea952f8ab90
Electron: 2025-06-21T05:26:18.966Z
ElectronBuildId: 34.5.1
Chromium: undefined
Node.js: 132.0.6834.210
V8: 20.19.0
OS: 13.2.152.41-electron.0

Does this stop you from using Cursor

Yes - Cursor is unusable