It supports OpenRouter, and any LLM provider with an OpenAI API compliant endpoint (most of them).
It was written to be extended as a good base. I hope you'll try it, fork it, extend/modify it for your own use.
I wanted to explore to see how difficult it is to make a useful code editor amid the Cursor Pricing Crisis. I think I reached the conclusion that the platform isn't very important, models are the sauce.