5.1 Codex Mini is not working

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

The Codex Mini model either refuses to work at all or displays an error:
“”"
The “ask” mode still prevents you from editing files and switching task statuses. To implement the plan, make these edits manually.
“”"

This is an error when attempting to execute the plan.

Steps to Reproduce

  • Create a plan
  • Start execution using 5.1 Codex Mini High

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.77 (Universal)
VSCode Version: 1.99.3
Commit: ba90f2f88e4911312761abab9492c42442117cf0
Date: 2025-11-13T23:10:43.113Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 25.1.0

For AI issues: which model did you use?

GPT-5.1 Codex Mini High

For AI issues: add Request ID with privacy disabled

cf2d7226-a871-4e02-80fd-3c262fe85c12 → c7b55489-9ab4-4517-bff2-2b238c2b5a83

Does this stop you from using Cursor

No - Cursor works, but with this issue

2

Observation: The error appears when attempting to build via the plan. If you call the build via chat, there is no error.

3

Hey, thanks for the report. This does look related to the known Plan Mode issues with GPT‑5 models that the team is already investigating.

As you discovered, using chat directly works as a workaround. For now, you can:

  • Run builds via chat instead of using the plan’s “Build” button
  • Switch to a different model for plan execution

To help with debugging, could you please share:

  • Screenshots of the exact error when it appears
  • Console logs from the moment it happens (Help → Toggle Developer Tools → Console tab)

I’ll escalate this to the engineering team together with your request IDs.