Going purely by the benchmarks from OP - you can essentially consider MPT equivalent to LLaMa. It might be better/worse depending on the specific task but not by much.
So compared to GPT3.5 - it's not great at all. That said, LLaMa showed significant improvements via fine-tuning and I expect those to apply here as well.
EDIT: Oh I forgot this is 7B. I personally haven't spent much time with 7B llama because my hardware can do 15/30B - and honestly 15B llama is very noticably better to the point where if you can run it you shouldn't bother with 7B. So this really can't compare to GPT3.5 without finetuning and even then it'll be behind (based on llama models)
