WWDC 2026: Apple Rebuilds Siri on Gemini, Opens iOS 27 to Multi-AI Extensions
Summary: Apple replaced its decade-old Siri with a Gemini-powered assistant and opened Apple Intelligence to third-party AI providers via an App Store marketplace.
Key Points
- Rebuilt Siri AI: The most significant Siri overhaul in 15 years, powered by a custom 1.2-trillion-parameter Gemini model running through Apple's Private Cloud Compute. Now ships as a standalone app.
- iOS 27 AI Extensions: A new framework allowing Claude, ChatGPT, Gemini, and Grok to replace Siri as the default AI across Writing Tools, Image Playground, and other Apple Intelligence features — the first time Claude reaches iPhone natively.
- Three-tier privacy stack: Queries route through on-device models first, then Private Cloud Compute, then Gemini's cloud layer — designed to minimize data exposure.
- End of ChatGPT exclusivity: Apple's single-provider deal ends; users choose their preferred AI through Settings, creating direct competition among the major frontier labs for device-level default status.
Why It Matters
With roughly 2 billion active Apple devices as distribution, whichever AI wins the default slot gains an enormous reach advantage. The partnership with Google to rebuild Siri signals how entangled the interests of AI rivals have become — Apple needed Google's model scale while Google needs Apple's install base.
Read More
- Apple iOS 27 Extensions Marketplace (AI Weekly) — AI Weekly
- WWDC 2026 full recap (Business Standard) — Business Standard