What the New Siri AI Is—and Why iOS 27 Matters
The new Siri AI in iOS 27 is a more conversational, context-aware version of Apple’s assistant that uses advanced on-device and cloud models to answer open-ended questions, understand what’s on your screen, and run tasks across apps and files. It builds on Apple Intelligence, first introduced with iOS 18, but shifts the focus to Siri as a chatbot-style helper with its own dedicated app and smarter voice interactions. You can talk to Siri in ongoing voice chats, ask follow-up questions, and expect the assistant to draw on information stored on your device. Behind the scenes, Apple uses a basic AFM 3 Core model and a more powerful AFM 3 Core Advanced model, and the one your iPhone can run will decide how many Siri AI features you actually get.
Full Siri AI: Which iPhones Support Every New Feature?
Only a handful of the newest iPhones get the complete Siri AI experience in iOS 27. To run both AFM 3 Core and the more capable AFM 3 Core Advanced model on-device, you need an iPhone 17 Pro, iPhone 17 Pro Max, or iPhone Air. On these devices, Siri can customize the expressiveness and pace of its voice and offer a more accurate dictation mode that automatically adds punctuation and formatting. According to ZDNET, “only newer devices can access all the features of Siri AI,” and those newer devices are exactly the ones powerful enough to host the Advanced model locally. If you are determined to use everything Siri AI offers, including the richer voice tweaks and best dictation, these flagships form the top tier of iOS 27 compatibility.
Partial Siri AI: iPhone Models With Basic On‑Device Intelligence
A larger list of phones support Siri AI but only with the basic AFM 3 Core model. These include iPhone 17 and 17e, iPhone 17 Pro and 17 Pro Max, iPhone Air, iPhone 16 and 16e, iPhone 16 Plus, iPhone 16 Pro, iPhone 16 Pro Max, and iPhone 15 Pro and Pro Max. On these models, you still gain a smarter, more conversational Siri that can understand your on-screen content, run tasks across apps, and tap into Apple Intelligence features, but you lose the extras tied to AFM 3 Core Advanced such as the full voice customization and the most accurate dictation option. This creates a clear line inside the iPhone range: many recent devices are compatible with iOS 27 and its Apple Intelligence features, while only a select few reach the highest level of Siri AI capability.
iOS 27 Compatibility vs. Siri AI Support: The Two-Tier Experience
iOS 27 runs on a much wider pool of iPhones than those that support Siri AI fully. ZDNET notes that iOS 27 is available for iPhone 11 and later, the latest iPhone SE, and iPhone Air, but only a subset gain AFM 3 Core, and an even smaller subset gain AFM 3 Core Advanced. That means some users will install iOS 27, see the marketing for Siri AI and Apple Intelligence, and still miss the most advanced features—or in some cases, Siri AI at all. Device fragmentation turns Siri AI into a two-tier experience: one tier where Siri feels like a modern AI assistant with deep on-device intelligence, and another where the assistant improves, but not to the same degree. Knowing which group your iPhone falls into helps you avoid disappointment when the update arrives.
Why Older iPhones Miss Out—and How to Decide on Upgrading
The gap comes down to hardware limits. AFM 3 Core Advanced has higher processing and memory demands, so Apple restricts it to phones with the newest chips and enough RAM to run complex models on-device. ZDNET points out that on iPad and Mac, Apple even calls out minimum memory levels such as 12GB for some models, hinting at how resource-hungry these features are. Older iPhones can still run iOS 27, but they lack the power to host the full Advanced model, pushing more of Siri’s work to the cloud and reducing feature depth. Commentators speaking on ABC Melbourne Drive describe Apple as playing catch up in AI, so this split is unlikely to vanish soon. If top-tier Siri AI is essential to you, that may influence your next upgrade, but if you only need basic improvements, your current compatible iPhone may be enough.
