I'd be less inclined to put that instruction there now with the faster Omni, but GPT4 was too slow to let it ramble, it wouldn't get to the point fast enough by itself. And of course it would waste three seconds starting off by rewording your question to open its answer.
In my system prompt I ask it to always start with repeating my question in a rephrased form. Though it’s needed more for lesser models, gpt4 seems to always understand my questions perfectly.
