I assume you haven't tried Alpaca (which hasn't been released), only Llama. See the instruction fine tuning section in the article.
I am optimistic for 30B or 66B to catch up with OpenAI, but 7B is unlikely to have the same quality.
https://i.imgur.com/V4lzLz7.png
It does quite well at simple reasoning. More complex stuff, it does struggle sometimes, but I am impressed by the output and the fact that it even runs on my computer.
I used the oobabooga repository on Ubuntu 22.