There is no moat in an API-gated foundation model. One LLM is as good as any other, and it'll be a race to the bottom.
The only way to mint a new FAANG is to build a platform that captivates and ensnares the populace, like iPhone or Instagram.
The value in AI will be accrued at the product layer, not the ML infra tooling, not the foundation model. The product layer.
It might be too late to do this with LLMs and voice assistants, though. OpenAI is super distracted, and there's plenty of time for Google, Meta, and Apple to come in and fill the void.
Everyone was too busy selling the creation of gods, or spreading FOMO to elevate themselves to lofty valuations. At the end of the day, business still looks the same as it always has: create value for customers, ideally in a big market where you can own a large slice. LLMs and foundation models are fungible and easy.