I don't see how it makes sense to use models outside of Grok or Composer in cursor unless you like the tooling to such degree that you're willing to pay out the nose for access to OpenAI and Anthropic to use with that tooling. And Codex is regularly scoring towards the top among harnesses, so you might as well use the best harness available for the given model. I'm happy with Grok and Composer in Cursor. If Cursor wants to add more models, they should host more open models.

The reason it makes sense is because different models are better at different things. Allowing yourself to be locked in to a particular model by these companies is a bad idea and will lead to worse outcomes for yourself and the market as a whole.

Because I pay $60 per month and not using the included API tokens on other models is wasteful.

You’d use it because until recently Cursor had the best setup for cloud agents and visual verification and a bunch of other features outside of the harness.

Is there a good place for harness comparison/scoring?