How does it compare to ChatGPT in terms of code quality?

It's a substantial improvement when actually coding on the fly, since copilot will also analyze code in your codebase. It just makes coding the BS parts less tedious.

I've got both running, and I find GPT4 more useful. Unless I'm using it wrong, Copilot is "better autocomplete" and saves some typing. GPT4 can help you reason about code, and has helpful suggestions about debugging. I'm probably going to bin Copilot.

I think you get copilot because you don't end up having to cut and paste stuff into a browser.

Have to say I'm very happy with copilot, it's definitely worth the 10 bucks a month.

Github Copilot uses a different model than chatgpt, with a tokenizer more fit for code rather than plain english language.