The chat part (mostly) uses GPT-4, you can also see which model is called in the request logs. Here is the official announcement: https://github.blog/changelog/2023-11-30-github-copilot-nove...

Okay thanks for pointing that out.

I figure if they do this, they have to throttle or nert it somehow since it is cheaper than ChatGPT Plus which also gives access to GPT-4.

It won’t answer questions that are not somehow related to code or computing, I usually don’t need anything else so I didn’t really test the limits of that so far.