iOS 27 Shipped a New Siri. The Bigger Change Is One Swift Protocol.

Tue, 15 Sep 2026 14:00:00 +0530

Apple shipped iOS 27 on September 14, and with it the public debut of Siri AI, a rebuilt assistant trained in collaboration with Google’s Gemini team and running across on-device Apple Foundation Models and Apple’s Private Cloud Compute.[1][2] That is the headline. It is not, for developers, the interesting part.

The interesting part shipped in the same release and got a fraction of the coverage: the Foundation Models framework’s LanguageModelSession API, the same one powering Siri AI’s app integrations, now runs on a LanguageModel protocol that third parties can conform to. Apple’s on-device model is no longer the only thing you can drop into that session. Google and Anthropic have both shipped conforming packages, so LanguageModelSession becomes a genuine abstraction layer over which model actually answers the prompt.[3]

Llm-Integration on Kuldeep Pisda

iOS 27 Shipped a New Siri. The Bigger Change Is One Swift Protocol.