Plan Mode Ultra Slow

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

On rare occasion when the model begins writing the plan, it outputs like 1 token every 3 seconds.

Steps to Reproduce

Use plan mode.

Screenshots / Screen Recordings

screenshot_2026-01-17_13-22-01.gif

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.3.38 (user setup)
VSCode Version: 1.105.1
Commit: 5d361ec90febc2eee7d3a0c5c8c6567985977500
Date: 2026-01-15T18:25:49.175Z
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?

GPT-5.2 High Fast (though I don’t know what models I’ve used before when this happened).

For AI issues: add Request ID with privacy disabled

b45969a8-7e42-472c-902c-3130edeff2cf

Does this stop you from using Cursor

No - Cursor works, but with this issue

2 Likes
3

Hey, thanks for the report.

Plan mode currently saves the file for every character, which causes rendering issues and slows streaming down a lot. Other users have reported something similar, the difference can be anywhere from about 10 seconds in Ask mode to 5 to 10 minutes in Plan mode for the same request: Plan writing is extra slow

Good news, the team is working on a fix that will ship in Cursor 2.4 later this month.

1 Like
4

are you seriously not rolling this back? don’t you have a feature flag? this is THE core functionality of cursor and is unusable

5

This is part of the price we pay for being on the cutting edge. They’ll work it out.