Model Releases · JUNE 8, 2026
Apple's iOS 27 Extensions API turns the iPhone into a four-way model marketplace
Siri runs on a custom 1.2-trillion-parameter Gemini under a reported ~$1B/year Google deal, but the bigger release is the Extensions framework letting users set Claude, ChatGPT, Gemini, or Grok as the system-wide default.
At WWDC 2026 on June 8, Apple announced an iOS 27 Extensions framework that lets users set Claude, ChatGPT, Gemini, or Grok as the system-wide default model for Writing Tools, Image Playground, and Siri itself. Tim Cook's last keynote as CEO was, in effect, the moment the iPhone stopped being an OpenAI distribution channel and became a four-vendor marketplace.
The Siri rebuild got the stagecraft, and it deserved some of it. The new assistant is a three-layer system, a query planner, a knowledge retrieval engine, and a summarisation layer, with inference running on a custom 1.2-trillion-parameter Google Gemini model hosted inside Apple's Private Cloud Compute enclaves. Bloomberg's Mark Gurman pegged the arrangement at roughly $1 billion a year, a number Apple didn't dispute when Craig Federighi framed the partnership on stage alongside Apple Foundation Models. A standalone Siri app ships beside the system integration, with a conversational UI and a "Search or Ask" panel accessible via a swipe from the Dynamic Island. App Intents handles on-screen awareness and cross-app task execution. Memory retention is user-configurable at 30 days, one year, or permanent.
Two years after the Siri AI revamp was first promised in iOS 18, this is what Apple shipped. It's competent. It's also outsourced.
The Extensions API is the more structurally important release. Four launch partners, parity treatment, and a new CoreAI developer framework that exposes the same plumbing to third-party apps. ChatGPT's privileged position inside Apple Intelligence, the centerpiece of the 2024 announcement, is now one option among four. For OpenAI, the iPhone exclusivity premium that anchored a meaningful chunk of its distribution narrative quietly evaporated this morning.
The timing tells the story. Ten days ago, on May 28, Anthropic closed a $65 billion Series H at a $965 billion post-money valuation, including $15 billion in previously committed hyperscaler money (Amazon contributing $5 billion) alongside Altimeter, Dragoneer, Greenoaks, Sequoia, Capital Group, Coatue, and D1. Claude Opus 4.8 shipped the same day. Anthropic didn't need iPhone distribution to justify a near-trillion-dollar mark, but it got it anyway, and on equal footing.
What Apple has built is a model-agnostic substrate where the assistant layer is Google, the optional defaults are everyone else, and the on-device frameworks are Apple's. It's the cleanest expression yet of the platform-owner thesis: don't pick a winner in the model layer, charge rent to all of them, and let users sort it out. Gurman's three-day-early scoop on the architecture and the deal terms suggests Apple wanted the framing settled before the keynote, because the keynote itself was the easy part. The hard part was admitting Siri couldn't be built in-house and turning that concession into a distribution business.
Cook is leaving on the deal that ends Apple's pretense of full-stack AI independence, and begins something more lucrative.