I have a fine tuned version of Mistral doing a really simple task and spitting out some JSON. I'm getting equivalent performance to GPT-4 on that specialized task. It's lower latency, it's outputting more tokens/sec., more reliable, private, and completely free.

I don't think we will have an Open Source GPT4 for a long time so this is sorta clickbait, but for the small, specialized tasks, tuned on high quality data, we are already in the "Linux" era of OSS models. They can do real, practical work.