iPhone 17's 8GB Limit Costs It These Two Siri AI Features in iOS 27 (opens in new tab)

Apple this week revealed what its most advanced on-device AI model does, and the feature list is shorter than the hardware requirements might suggest. In its Siri AI announcement during WWDC 2026, Apple confirmed that the model powers two things: more expressive Siri voices and a major accuracy gain for systemwide dictation. Both require 12GB of unified memory.