I think ChatGPT is most similar to text-davinci-003 which does have gaps in it's knowledge which it can be stubborn about but code-davinci-002 has fewer gaps an

I think ChatGPT is most similar to text-davinci-003 which does have gaps in it's knowledge which it can be stubborn about but code-davinci-002 has fewer gaps and can be more reasonable about requests. It's sometimes gets stuck in a loop though and is in beta with very limited capacity. Point being ChatGPT is the not quite best programming model.