iOS 27 lets you pick Claude, ChatGPT, or Gemini as your default AI on iPhone

My take: At WWDC on June 8, Apple unveiled the Extensions system for iOS 27: an AI marketplace built into the OS that lets you swap the default AI across the entire Apple Intelligence experience, including Siri, Writing Tools, and Image Playground. Claude, ChatGPT, and Gemini are first in line; Anthropic already published a Swift module for developers to embed Claude directly in native Apple apps. It is the first time Apple has opened its intelligence layer to third parties this way, placing Claude on equal footing with the native assistant across hundreds of millions of devices.