I just signed up for the Github Copilot Business and installed Visual Studio Code for Mac. I added the GitHub Copilot and the GitHub Copilot Chat extensions. When I asked it what version it was using it said it was using GPT 3.
I am on the paid-plan (20$ for a month).
How can I get it to use GPT 4?
short answer: You can't force copilot to use certain version of GPT model.
But Officially starting November 30th 2023, Copilot Chat is powered by GPT-4. link
Now both Copilot for Pull Requests and Copilot Chat use GPT-4