Mark Gurman's report on May 5. Caveat: this is a Bloomberg leak, not an Apple announcement. But Gurman is Apple's most reliable reporter — when he says "people with knowledge of the matter," it almost always happens.
The plan for iOS 27 / iPadOS 27 / macOS 27 (fall 2026): a new "Extensions" system that lets users pick which AI model powers which Apple Intelligence feature. Different models for different tasks. Claude for Writing Tools. Gemini for Image Playground. Something else for Siri. Your call.
AI providers integrate by shipping App Store apps that hook into Extensions. And the juicy bit: each model can have its own Siri voice. You'll literally be able to give Claude one voice and Gemini another.
Apple's been moving this direction quietly — ChatGPT integration since iOS 18, an upcoming Gemini deal with Google. Extensions is the full opening of the platform. Watch WWDC in June for the official reveal.