Supposedly they're going to do a fair bit of it on device for privacy reasons, so the only payment for that will be RAM and battery power.
For stuff that can't be run on phones, some of it will be run on Apple's servers, which I'm assuming Apple is eating the cost of for the time being.
Stuff that needs heavy reasoning or external knowledge will be processed by google, in exchange for $1 billion a year. However Google already pays Apple $20 billion a year for google to be the default iOS search engine, so you could view this as just changing to google paying $19 billion a year instead.
I think the server-side stuff will be a mix of users & developers paying. I have seen this info in several places:
> PCC delivers a powerful server model without compromising privacy: data is never stored, used only for the request, and independently verified. It's integrated with the OS and iCloud, so there's no authentication or API keys, no token cost to developers, a daily per-user limit (higher with iCloud+), and eligibility for apps under 2M downloads.
Source: summary on https://developer.apple.com/videos/play/wwdc2026/319/
I haven’t seen any information about what’s happening with apps over 2M downloads, who graduate from the Small Business Program. https://developer.apple.com/app-store/small-business-program...