OpenAI will always be in a different league. I know Apple is making some amazing advancements with LLMs, but OpenAI basically recreated Google Search as a chatbot.
I'm not saying Apple couldn't do the same thing, but the model alone would take up so much space on the phone that it would not be practical. I can see Apple making something closer to a very fine tuned mistral 7B than GPT4.
But I'm sure in a year this comment will be wrong.