A Developer's Guide to Apple's Foundation Models Framework in iOS 26

What it is: A free, privacy-first, on-device LLM framework (featuring a ~3B parameter model) that runs locally on the Neural Engine via LanguageModelSession. Killer Features: Tool Calling: Allows the model to seamlessly trigger your local Swift functions (e.g., fetching weather or calendar data). @Generable: Forces the model to output type-safe Swift structs, completely eliminating the need to parse raw JSON. Streaming: Built-in support for asynchronous response streaming for better UX. Whe...