Where does the bug appear (feature/product)?
Cursor IDE
Describe the Bug
Tried to use custom OpenAI provider url and API key, and can not use any model besides gpt-4.1.
Attempted to make API call directly just to see if token is working and see no issues.
Steps to Reproduce
Set custom OpenAI base url and API key, try to use any model, for example gpt-5-mini
Expected Behavior
Expected the model to work
Operating System
MacOS
Current Cursor Version (Menu → About Cursor → Copy)
Version: 1.5.9 (Universal)
VSCode Version: 1.99.3
Commit: de327274300c6f38ec9f4240d11e82c3b0660b20
Date: 2025-08-30T21:02:27.236Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.5.0
Additional Information
Tried this with my team plan, can not disable privacy mode there, but here is the requestId:a8cc4ecb-3181-4ab8-9945-256682b1de40
Created a free personal account to reproduce the issue, same behavior, and privacy mode is not enabled, here is a requestId: 3ad7a234-c09b-403f-91a1-8bc6ffd40e36
Does this stop you from using Cursor
Sometimes - I can sometimes use Cursor