Goog, Meta? They are by far leading in AI research, and they've both developed their own chip. Apple is also going to come out ahead with their Neural chip - imagine chatGPT and stable diffusion becoming part of the iOS SDK
Yes, I can imagine commoditization of such models. Plus they own their chips/silicon and have billions of devices deployed. I think Apple is one to watch because UX is challenge for AI integration. ChatGPT made UX for LLMs user friendly. Apple's design history is superior to its competitors.
I would add MSFT due to their exposure to OpenAI and their very successful previous and upcoming integrations (GH Co-Pilot, Bing revamp, upcoming Excel Co-Pilot etc.)