iOS 27 opens the Foundation Models framework to third-party LLM providers via a new public LanguageModel protocol, allowing anyone to integrate server-based or local models (e.g. Claude, Gemini, CoreAI, MLX) using the same API as Apple's on-device system model.
ā¢ Any LLM ā cloud, local, or open-source ā can now be swapped in without changing app-level code, since all models share the same LanguageModelSession API.
ā¢ Anthropic (Claude) and Google (Gemini) are shipping first-party Swift packages built on this protocol, giving developers immediate access to frontier models with no custom networking code.
ā¢ The protocol's Executor lifecycle (automatic teardown, prewarm, streaming deltas) handles resource management and progressive rendering out of the box, removing boilerplate from every integration.
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 āApp 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.