I don't use Cursor (I'm on Jetbrains) but from what I read it must be the autocomplete. Github Copilot is literally unusable. I've tried it many times in the last month and everything it suggests is stupid and utterly wrong. The suggestions are not subtly wrong - they often have nothing to do with what I'm working on. It wasn't this bad at the beginning. Mind you, I code mainly in Python, pretty common stuff most of the time.
I keep reading here that Cursor has great autocomplete so we could be talking about a 1000% improvement compared to Copilot rather than 1% as on of the other commenters is positing.
Personally I've seen Cursor make boneheaded autocomplete suggestions at roughly the same rate that Copilot does. And Cursor was also buggy in other annoying ways, and its "jump" suggestions (where it tries to predict where to move your cursor next) were usually stupid. So I ultimately switched back to Copilot.
I wouldn't qualify the suggestions I'm getting as boneheaded, but rather disastrous. I have completions turned off by default because they're so stupid it's unbearable. But then maybe a few times a month I'm low on energy and faced with the typical repetitive task: fill out this large dictionary with predictable values, type these classes which are variations of another, write some very grindy tests, what-have-you. I turn it on in the hopes that it will save me some work, see what it's suggesting, and turn it off back again in seconds. It literally cannot pick up on blatantly predictable local patterns anymore. I don't know what's happened to it because it used to be able to at least do that.
I only have the 4o option for completions. Like, I see the option in the settings but the dropdown only produces 4o for me. I seem to remember that in github.com I have all the models exposed, but in PyCharm I only get that for autocomplete. I do get a wider model choice in the chat pane. I'll look into it.
I keep reading here that Cursor has great autocomplete so we could be talking about a 1000% improvement compared to Copilot rather than 1% as on of the other commenters is positing.