Plan mode with multiple models

[NewCoder891 (VibeCoder89)]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When I start plan mode with multiple models, only the first model enters plan mode. the other model was starting in agent mode and already made changes to my codebase! If you choose plan mode then all modells should opperate in plan mode.

Steps to Reproduce

create a prompt for a feature. select plan mode and use 2 models like sonnet and gpt5 for parallel exectution. Only one will enter plan mode. the other one agent mode.

Expected Behavior

Both models should opperate in plan mode. not only one.

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.69 (user setup)
VSCode Version: 1.99.3
Commit: 63fcac100bd5d5749f2a98aa47d65f6eca61db30
Date: 2025-11-07T18:21:29.650Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

sonnet 4.5, gpt5 high

Does this stop you from using Cursor

Yes - Cursor is unusable

[deanrie]

Hey, thanks for the report. It looks like a bug where the plan mode setting isn’t applied to all models during parallel execution.

Please share:

• Request ID: in the chat panel, open the menu (top right) → Copy Request ID
• Screenshot or video: showing both models running - one in plan mode and the other in agent mode making changes
• Specific models: confirm you ran Sonnet 4.5 and GPT-5 High in parallel

This will help the engineering team investigate. I’ll pass this to the team.

[NewCoder891 (VibeCoder89)]

b9709d3a-9985-4efc-9615-7425e8661ff8
request id

yes, I confirm models are correct.

As you can see in screenshots. Gpt5high already made changes to the files, while sonnet was in plan mode.