or the router was routing them to the best model all the time prior to launch.

I had a very brief window where gpt-5 was really good/fast on cursor-agent day of launch.

also horizon-alpha-beta on open router im pretty sure they where gpt-5, and you could feel them messing with the routing and affecting overall the capabilities of the model to do agentic stuff

some times it gets stuck and uses no tools, I suspect that's the lesser model

The router sounds kind of like an exciting feature. I've actually gotten into the habit of using Gemini 2.5 Pro for some things and plugging other things into ChatGPT because I don't have access to thinking so I know it will be fast. Having a router that can intelligently figure out when my query requires more thought would be really valuable. I'm still probably going to want a "no really, throw this at the super-duper frontier model" button but I would probably use it less.

Are you aware of anybody with early access who didn't like GPT-5? Or who isn't a fan of earlier versions?

There is obviously a bias when selecting whom to give early access to. I'd love to see counterexamples to that though.