Probably a 13" or 14" model.
Despite his sources in the supply chain and incredible predictive powers, he can't know if Apple marketing will randomly call it a "Pro" or not.
We know the 16" model will launch in November based on the Apple Store availability of 3-4 weeks of the 15" model.
A BTO 15" is showing for me as shipping in 1-3 business days. How is that availability of 3-4 weeks?