Core AI is Apple's new on-device inference framework for iOS 27, giving developers direct access to the same high-performance ML execution engine that powers Apple Intelligence. It supports CPU, GPU, and Neural Engine across all Apple Silicon devices.
• Run your own AI/ML models entirely on-device with no server costs or per-token fees, using the same engine that powers Apple Intelligence
• A modern Swift API with memory-safe primitives (NDArray, InferenceFunction) makes integration straightforward for any model size
• Complete toolchain support — CoreAI Torch Python converter, ahead-of-time compilation, dedicated Instruments integration, and a visual tensor debugger — shortens the iterate-evaluate-ship cycle dramatically
Foundation Models is a new Apple framework introduced in iOS 27 that gives developers on-device access to the same Apple Intelligence language model powering system features, enabling text generation, structured output, and tool-calling entirely on-device without a network connection.
Visual Intelligence brings iOS 17's Visual Look Up capabilities to a new developer-facing API surface in iOS 27, letting apps pipe live camera frames or static images through on-device scene understanding to extract subjects, text, barcodes, and rich semantic labels without any cloud round-trip.
iOS 27 opens the Foundation Models framework to third-party LLM providers via a new public LanguageModel protocol, enabling anyone to integrate custom, server-based, or open-source models using the same Swift API as Apple's on-device system model.
In-depth guide
iOS 27 On-Device AI & Apple Intelligence →App Schemas let developers describe their app's content and actions using pre-defined domain schemas (like the Calendar domain) so Siri can understand, search, and act on app data without custom NLP. Entities conforming to IndexedEntity are donated to Spotlight's semantic index, enabling natural-language queries over app content.