One is tuned for chat. It has that annoying ChatGPT personality. Instruct is a little "lower level" but more powerful. It doesn't have the personality. It just

One is tuned for chat. It has that annoying ChatGPT personality. Instruct is a little "lower level" but more powerful. It doesn't have the personality. It just obeys. But it is less structured, there are no messages from user to AI, it is just a single input prompt and a single output completion.