As I said to the other commenter, I specifically avoided saying "only", I said "primarily", and I should have clarified that I meant "primarily fine-tuned". My point is simply that it is far more likely to spit out results that are patterned after GitHub than results that are patterned after any inter-programmer communications.

Also, I wasn't contesting that autocomplete uses GPT 3.5 as the base model, I was contesting the idea that it uses the same derivative model as chat.