Hey, thanks for the report.
The issue is that BYOK is only available for Pro users. In your screenshot I can see “Free Plan”, so custom models won’t work.
To use your OpenAI API key with a custom base URL:
- Upgrade to the Pro plan at cursor.com/settings
- After that, you’ll be able to add your API key and base URL
About SambaNova specifically: there’s an official integration here Build with Cursor - SambaNova Integration Guide, but it also requires Pro.
One more thing: even on Pro, custom models like Meta-Llama may currently have issues because of client-side validation in recent Cursor versions. Similar reports are here: Custom Model problems
Let me know if you still have issues after upgrading to Pro, and I’ll ask the team to take a look at your specific SambaNova case.