TheTechno Optimist.

Siri AIApple—Apple and Google sign multi-year deal: next-generation Apple Foundation Models will be based on GeminiSiri AIApple—Apple agrees to pay $250 million to settle class action over delayed Siri featuresSiri AIApple—Apple unveils Siri AI at WWDC26, a rebuilt assistant with personal context, screen awareness and app actionsSiri AIApple—Apple sets iOS 27 release for September 14, with Siri AI in beta for English users

Apple

Siri AI, Apple Foundation Models

US$5T market capest. 1976apple.com (opens apple.com)Checked 11 Oct

The brief

Analyst view
  • Siri AI, a rebuilt assistant on Gemini-based Apple Foundation Models, shipped as a beta with iOS 27 on Sep 14, 2026.
  • The personal Siri promised in 2024 slipped to 2026; Apple settled the resulting false-advertising suit for $250M.
  • John Ternus replaced Tim Cook as CEO on Sep 1, 2026; Cook became executive chairman.

Technical approach

As reported
On device

Small model on the phone

Apple's 2025 on-device model: about 3 billion parameters at 2 bits per weight, so many requests never leave the device.

Cloud

Private Cloud Compute

Harder requests go to Apple-run servers on Apple silicon, designed so personal data is not stored or visible to Apple.

Models

Built on Google Gemini

Since a January 2026 deal, the next-generation Apple Foundation Models are based on Gemini models and Google cloud technology.

Apps

Assistant that acts inside apps

An on-device orchestrator uses the Spotlight index and an App Toolbox of app actions, so Siri can find personal data and act across apps.

Primer