Opus 4.5 complaing Cursor keeps timing out

[Tony_Ng]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Opus 4.5 told me to edit the code manually because its keep waiting to get somthing finished
The tool keeps timing out. Let me give the user a quick manual fix they can try.
I keep timing out. Here’s the quick fix you can do manually:
Open ats_log_issue_matrix.go around line 59 and add this debug line:

Steps to Reproduce

every time when there is a long job for the agent to complete

Screenshots / Screen Recordings

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.48 (system setup)
VSCode Version: 1.105.1
Commit: ce371ffbf5e240ca47f4b5f3f20efed084991120
Date: 2025-12-04T19:26:27.263Z
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?

Opus 4.5

Does this stop you from using Cursor

No - Cursor works, but with this issue

[deanrie]

Hey, thanks for the report. I need a bit more info to find why long tasks time out:

Please send:

• Cursor Settings > Network > Run Diagnostics - a full screenshot
• Help > Toggle Developer Tools > Console - errors at the moment of the timeout
• In the timed‑out chat: chat menu > Copy Request ID - the last 2–3 IDs
• A list of installed extensions or a screenshot of Installed

Quick checks to try:

1. Disable HTTP/2: Settings > search “HTTP/2” > turn on “Disable HTTP/2”, then restart Cursor
2. Test without VPN/proxy and on a mobile hotspot
3. Clean profile: run in terminal
   cursor --user-data-dir="TempProfile"
   Re-run the long Opus 4.5 task there
4. Compare with other models in the same project and mode: Composer 1, Sonnet 4.5, GPT 5.1 High
5. If Nx Console is installed, temporarily disable or remove it and restart Cursor - there was a recent case where this fixed similar failures: Unable to Reach Model Provider for All Models Except Composer1

Share the results. If the timeout reproduces in a clean profile and you have a Request ID, I’ll pass it to engineering.