Where does the bug appear (feature/product)?
Cursor IDE
Describe the Bug
When using GPT-5 High for editing, the model sometimes fails to apply any changes to the file but still reports that the edits were successfully completed.
For example, if the edit request has invalid parameters or other issues, the tool does not modify the code/text, yet the response states that changes were made.
This issue occurs only with GPT-5 High and does not happen with the regular GPT-5.
Steps to Reproduce
Open Cursor and select GPT-5 High .
Request an edit on code/text
In some cases, the model does not perform any actual changes.
Despite that, the output message states that edits were applied successfully.
Operating System
Windows 10/11
Current Cursor Version (Menu → About Cursor → Copy)
Open Cursor and select GPT-5 High for editing.
Request an edit on code/text with parameters that are slightly unclear or complex.
In some cases, the model does not perform any actual changes.
Despite that, the output message states that edits were applied successfully.
Additional Information
I think it wasn’t like this at the beginning — it only happened later, after some change you made.
During the trial weeks, these problems didn’t exist.
Does this stop you from using Cursor
No - Cursor works, but with this issue