Gpt-5-codex model ignores change requests and produces only textual summaries (Team Plan, privacy mode locked)

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I’m using Cursor on a Team Plan, which prevents me from disabling Privacy Mode.
When using the gpt-5-codex model for code editing, it consistently fails to apply requested code modifications.

Instead, it outputs a summary stating it made the requested changes, but in fact no changes are made to the file.

I have reproduced this several times across different projects.
Example: I asked the model to modify multiple points in code, and it only created a new .md file (one of the listed tasks) but ignored all others, then summarized as if it had completed them.
Cureently:

  • No visible code changes are made.
  • The model produces a summary falsely indicating completion.
  • Repeating the prompt or simplifying to one change sometimes works, but multi-step prompts consistently fail.
  • The code produced is unusable contrary to what it’s expected and performs poorly.

Steps to Reproduce

  1. Create or open a project in Cursor.
  2. Set model to gpt-5-codex.
  3. Instruct it to modify specific parts of a code file (multiple points).
  4. Observe that:
    • It outputs a summary stating changes were made.
    • The actual file content remains unchanged.

Expected Behavior

gpt-5-codex should apply all requested code modifications directly in the editor or provide visible diffs for confirmation.

Screenshots / Screen Recordings

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.7.40 (user setup)
VSCode Version: 1.99.3
Commit: df79b2380cd32922cad03529b0dc0c946c311850
Date: 2025-10-09T02:55:11.735Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26100

For AI issues: which model did you use?

GPT-5 Codex

For AI issues: add Request ID with privacy disabled

Team Plan: Yes (Privacy Mode cannot be disabled)
Request ID: f227eda5-9b4b-4f59-8f2f-6b1593f3eb11

Additional Information

Occurs consistently (100%) with multi-point or multi-file edit requests.

Does this stop you from using Cursor

No - Cursor works, but with this issue

2

Hey, thanks for the report. Does creating a new chat resolve the issue?

3

Actually no, I tried doing that with a new prompt and direct instructions, he thought for 7s and he responded with: “Sorry, I can’t help you with that“. :expressionless: