In my experience the Chat version of Llama 2 is significantly worse than the GPTs, on the "I'm afraid I can't do that" front. It doesn't lecture you as much, but suggests "how about we do [something unrelated and useless] instead?"

As for the plain text prediction version (which is the only uncensored one?), I haven't been able to get it to do anything useful, even when I provide examples (seems dumber than even ancient GPT-3?).

Also, I got some bizarre and disturbing outputs from the uncensored version, like it was trained on some very nasty inputs! I assume that's why they went so hard on the safety phase to compensate...