But this is very much _not_ what this is.
Apple showed a bunch of new APIs at WWDC last week. One of this is a way for a developers to interact with LLM's in a way that let's you easily swap out models (with a bunch of other niceties around it), including swapping between on-device and remote models.
This is _Anthropic_ (not Apple!) shipping their support for that framework, so you can also switch between different Anthropic models using the same APIs you'd use to swap between a local or PCC model.
I expect OpenAI will probably ship their shims in the next couple of weeks too? (You can probably vibe-code one in half an hour if you point Codex at the Anthropic one, tbh).
(Apple also doesn't use "Apple Foundation Model" anywhere in the user-facing marketing materials AFAICT, this is strictly developer facing terminology, but I could be wrong?)
My impression is that people are _wildly_ misunderstanding what this _actually_ is, and running wild with speculation/interpretation.