🔧 Core ML vs Foundation Models: Which Should You Use?

With iOS 26.3 now in the wild, iOS developers have two powerful on-device AI frameworks to choose from: Core ML — Apple's veteran ML inference engine — and Foundation Models — the new framework that exposes Apple's ~3B parameter LLM from iOS 26 onwards.

They sound like they do similar things. They don't.

This article cuts through the confusion,...