It looks like both, and they're apparently using Apple Silicon in their own datacenters. From Bloomberg[0] (archived)[1]: "Apple Inc. will deliver some of its

It looks like both, and they're apparently using Apple Silicon in their own datacenters. From Bloomberg[0] (archived)[1]: "Apple Inc. will deliver some of its upcoming artificial intelligence features this year via data centers equipped with its own in-house processors, part of a sweeping effort to infuse its devices with AI capabilities. The company is placing high-end chips — similar to ones it designed for the Mac — in cloud-computing servers designed to process the most advanced AI tasks coming to Apple devices, according to people familiar with the matter. Simpler AI-related features will be processed directly on iPhones, iPads and Macs ... The first AI server chips will be the M2 Ultra, which was launched last year as part of the Mac Pro and Mac Studio computers, though the company is already eyeing future versions based on the M4 chip..." ... Relatively simple AI tasks — like providing users a summary of their missed iPhone notifications or incoming text messages — could be handled by the chips inside of Apple devices. More complicated jobs, such as generating images or summarizing lengthy news articles and creating long-form responses in emails, would likely require the cloud-based approach — as would an upgraded version of Apple’s Siri voice assistant. ... For now, Apple is planning to use its own data centers to operate the cloud features, but it will eventually rely on outside facilities — as it does with iCloud and other services. The Wall Street Journal reported earlier on some aspects of the server plan." --- And from [2], Apple has been working on Apple Chips in Data Center (ACDC) for few years, focusing on AI inference, not training. [0] https://www.bloomberg.com/news/articles/2024-05-09/apple-to-power-ios-18-ai-features-with-in-house-server-mac-chips-this-year https://www.bloomberg.com/news/articles/2024-05-09/apple-to-... [1] https://archive.ph/MUswk https://archive.ph/MUswk [2] https://www.medianama.com/2024/05/223-apple-launches-project-develop-ai-chips-data-centers/ https://www.medianama.com/2024/05/223-apple-launches-project...