Llama itself performs comparably to GPT3.5 (at least 30/60g models), but the RLHF of chatgtp is much better than what the community has produced thus far, and it's tuned to work well without tinkering. There will be open source models with that level of fine tuning in the near future, at which point ChatGPT4 will mainly be superior for stuff like code that needs the best possible cohesion and accuracy.
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