The completely reimagined Siri arriving with iOS 26.4 is the most significant revision to Apple's assistant in its 15-year history. The headline: Siri can now see and understand what is on your screen, reason about it, and act across multiple apps simultaneously.
The Gemini Partnership
The server-side reasoning is powered by Google's 1.2 trillion parameter Gemini — running on Apple's Private Cloud Compute infrastructure, where data is processed ephemerally with cryptographic attestation that even Apple cannot access the content.
For developers, on-screen awareness creates opportunity: apps with well-structured accessibility metadata will be dramatically more useful with the new Siri. Our mobile development team is already scoping how new SiriKit APIs can be leveraged in client applications.
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