Apple likely plans to use their own infrastructure [0], and why should they add a major competitor as a middleman?
[0] https://www.reuters.com/technology/apple-power-ai-servers-wi...
[0] https://www.reuters.com/technology/apple-power-ai-servers-wi...
Emphasis mine. I don't think there's any chance that means ChatGPT will run on Apple Silicon. It seems more likely that they will use it to power their internal CoreML/MLX-based research, anything more would kinda be a waste of money and electricity.