Describe the Bug
Even when using only Ask mode and enabling only supported OpenAI models (such as gpt-4.1) with my own OpenAI API key, I always get the following error:
Agent and Edit rely on custom models that cannot be billed to an API key. Please use a Pro or Business subscription and/or disable API keys. Ask should still work.
This happens every time, even though I am not using Agent or Edit modes.
Steps to Reproduce
Register your own OpenAI API key in Cursor settings
Use the Ask mode to send a prompt
The error message appears every time
Expected Behavior
Ask mode should allow me to use my OpenAI API key with supported models for completions, without requiring a Pro or Business subscription, and without showing Agent/Edit errors.
Screenshots / Screen Recordings
Operating System
Windows 10/11
Current Cursor Version (Menu → About Cursor → Copy)
Version: 1.3.9 (user setup)
VSCode Version: 1.99.3
Commit: 54c27320fab08c9f5dd5873f07fca101f7a3e070
Date: 2025-08-01T20:19:30.453Z
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.22631
Additional Information
The API key is verified and working
This problem did NOT occur before updating Cursor. Everything worked as expected with the same API key and settings in the previous version.
Does this stop you from using Cursor
Yes - Cursor is unusable
