If Apple is running the inference from Apple iPhones and Apple data centers then Apple has operational control. Google’s influence ends the moment they hand the weights over to Apple.
Right — I suppose I mis-phrased my first sentence a bit, because I guess it can be interpreted as me saying the boundary is blurred, when what I was trying to write is: in operation there is nothing crossing any boundary; Google are not in the picture.
They are using Google Cloud.
https://security.apple.com/blog/expanding-pcc/?linkId=100000...
"Now, we are collaborating with Google and NVIDIA to run new Apple Intelligence workloads on Google Cloud, extending our industry-leading PCC privacy commitments to third-party data centers for the first time."