Custom OpenAI base URL breaks model list

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

When I override openAI Base URL it corrupts the list of models in chat. It adds models like gpt-5-nano which aren’t enabled in the list but now are displayed in the chat model selection, see screenshot 1. Also, there’s some notification (1) near model tab in settings, but it doesn’t say what’s the issue anywhere, the form doesn’t allow me to upload second screenshot…

Steps to Reproduce

  1. Add custom endpoint (in my case, I use nanoGPT).
  2. See list of models change weirdly.

Expected Behavior

List should not change weirdly?

Screenshots / Screen Recordings

cursor_bug_1.png
cursor_bug_1.png1402×1053 53.7 KB

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.6.42 (user setup)
VSCode Version: 1.99.3
Commit: 5911e9593196a000b1c00553aaf03b0b32042b90
Date: 2025-09-20T17:16:56.346Z
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

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

Hey, thanks for the report, we’ll look into it.