Apple's Advanced Siri AI Limited to Three iPhone Models with 12GB RAM
Apple's most powerful on-device Siri AI model, AFM Core Advanced, is exclusive to the iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air—the only models with 12GB of RAM. The exclusive features include voice customization (adjusting expressiveness and pace) and more advanced systemwide dictation with automatic capitalization and punctuation. While these features represent incremental improvements, the capability gap between premium and standard iPhones is expected to widen as AI features become more central to device functionality.
Apple announced at WWDC 2026 that its most advanced on-device Siri AI model, called AFM Core Advanced, will only run on three iPhone models: the iPhone 17 Pro, iPhone 17 Pro Max, and iPhone Air—all equipped with 12GB of RAM. The exclusive features are voice customization, allowing users to adjust Siri's expressiveness and speaking pace, and enhanced systemwide dictation that automatically handles capitalization, punctuation, and formatting. While all compatible iPhones will receive improvements to Siri AI and dictation capabilities in iOS 27, the three premium models will have noticeably superior dictation accuracy and potentially faster AI query resolution due to the 20-billion-parameter AFM Core Advanced model compared to the 3-billion-parameter standard model. The article notes that while these differences may seem incremental for general users, they could be consequential for those who rely heavily on voice dictation for messaging and hands-free navigation. The capability gap between premium and standard iPhones is expected to grow as AI becomes more integral to device functionality.
What's missing
The article does not specify which other iPhone models will be compatible with iOS 27 and standard Siri AI, nor does it clarify the full range of devices that will receive the basic improvements to dictation and Siri functionality across the iPhone lineup.
What different sources said
- TechRadarCenter
Only 3 iPhones can access the best version of Siri AI — here’s which features are exclusive to Apple's 'most powerful on-device model', AFM Core Advanced, and whether you should care about them
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