iOS 27 ships September 14, 2026, and its headline feature is a completely rebuilt Siri — internally and publicly called Siri AI — that runs on Google's Gemini models under a partnership Apple announced at WWDC in June. The more consequential change for anyone who already has a favorite AI assistant: a new Extensions system lets you set Claude, ChatGPT, Gemini, or Grok as the actual backend Siri hands your requests to, per request type, instead of being stuck with whatever Apple ships. That's a genuinely different posture from every previous iOS release — Apple isn't just improving its own assistant, it's turning Siri into a router that can hand your question to whichever model actually handles it best, and you get to decide which one that is.
What Apple actually announced, and when
Apple's AI roadmap this cycle happened in two parts. At WWDC 2026 in June — the last keynote delivered under outgoing CEO Tim Cook before John Ternus took over — Apple confirmed the ground-up Siri rebuild and its partnership with Google, using Gemini models to train the system that now powers Siri AI. Then, at the September 9 "Surprise and Shine" hardware event led by Ternus, Apple shipped the hardware iOS 27 is designed to run best on: the iPhone 18 Pro and Pro Max, the company's first-ever foldable iPhone, and updated Apple Watch models. iOS 27 itself becomes available to the public on September 14.
The split matters because the software story (Siri AI, Extensions, on-device AI features) and the hardware story (the new A20 Pro chip, camera hardware) were announced three months apart, but they land on devices in the same week — which is why this feels like one big AI moment even though Apple built it in two separate announcements.
Siri AI: what actually changed
The old Siri answered one request at a time and mostly failed at anything requiring genuine reasoning. Siri AI is a different product:
- Real back-and-forth conversation. You can have a multi-turn exchange rather than issuing isolated commands, and Siri retains context across the conversation.
- Multiple tasks in one request. "Text my sister I'm running late, then find a parking spot near the restaurant" is now one request instead of two.
- Personal context. Siri AI can reference your emails, texts, files, photos, and notes to answer questions that need information only your device actually has.
- Cross-app actions. Siri can complete tasks that span multiple apps on your behalf, not just launch one app and stop.
- A dedicated Siri app. Siri AI now lives in its own app in addition to its system-wide presence, giving it a proper home the old Siri never had.
This all runs across iPhone, iPad, Mac, Apple Watch, and Apple Vision Pro — it's a platform-wide change, not an iPhone-only feature.
The part that actually matters if you already use ChatGPT or Claude
Here's the genuinely new mechanic: iOS 27 introduces Extensions, a system-level API that lets third-party AI providers plug directly into Siri, Writing Tools, and Image Playground. Claude, ChatGPT, Gemini, and Grok are confirmed as user-selectable options at launch. Once you enable a provider in Settings > Apple Intelligence & Siri, you can route different kinds of requests to different models — Claude for anything code-related, Gemini for research questions, ChatGPT for general writing — rather than accepting one assistant's judgment on everything.
Paired with App Intents 2.0, which turns any app into a Siri-callable endpoint, this is the first version of iOS where "ask Siri" doesn't necessarily mean "ask Apple's model." It means "ask whichever model you've decided is best for this specific kind of question."
Open ChatGPT → · Open Claude → · Open Gemini →
How to actually set this up
1. Update to iOS 27 and open Settings > Apple Intelligence & Siri. 2. Under the Extensions section, enable the AI apps you already have installed — Claude, ChatGPT, Gemini, or Grok. 3. Assign a default provider for general Siri requests, and set per-category overrides if you want different models handling different request types. 4. Test with a task you know each model handles differently — a coding question, a research question, a writing request — to confirm routing actually works the way you configured it.
What that routing decision should actually look like
| Request type | Best assistant to route it to | Why |
|---|---|---|
| Code, debugging, technical explanations | Claude | Strongest at structured reasoning and long technical context |
| Research, current events, cited answers | Gemini or Perplexity | Grounded in live search and Google's index |
| General writing, brainstorming, everyday tasks | ChatGPT | Fastest, most flexible for varied everyday requests |
| Real-time information tied to X/social sentiment | Grok | Trained with direct access to current X posts |
The camera and Photos AI features nobody's talking about as much
Siri AI is the headline, but iOS 27 also reshapes how AI shows up in the Camera and Photos apps:
- Visual Intelligence moves into the Camera app as a new "Siri" mode alongside Photo, Video, Portrait, and Panorama, reachable by swiping the mode carousel instead of relying on the Camera Control button.
- Visual Intelligence gains new scanning abilities: point it at a nutrition label to log what you're eating, or at a business card to create a new contact automatically.
- Three new Photos editing tools build on the Clean Up tool from iOS 18: Extend generates additional image content beyond the original frame, Enhance improves quality with one tap, and Reframe lets you change an image's perspective after it's already been captured.
- Natural-language photo editing is in testing — describing an edit in plain language ("make the sky more dramatic," "warm up the lighting") instead of manipulating sliders.
AI web search, and the feature that didn't make it
iOS 27 also adds an AI-powered web search layer inside Apple Intelligence, surfacing summarized, direct answers through Safari or Siri rather than sending every query out to a search engine — a move that reduces (without eliminating) Apple's dependence on Google for everyday search, even while Google's Gemini now powers Siri's reasoning underneath.
One feature didn't survive to launch: an AI health agent, planned as part of a Health+ service that would interpret your health data and suggest nutrition, exercise, and sleep changes. Reporting through the summer indicated Apple scaled the project back and it was cut before the iOS 27 beta shipped. If you're specifically waiting for AI-driven health coaching from Apple, that's not part of this release — worth knowing before you upgrade expecting it.
Which iPhones actually get the full experience
Siri AI's on-device requirements only reach back to the iPhone 15 Pro — roughly three and a half generations of hardware. If you're on an iPhone 14 or earlier, iOS 27 will install, but you won't get Siri AI itself. The new iPhone 18 Pro and Pro Max obviously qualify, and they're built around an A20 Pro chip on a 2nm process specifically suited to running these models faster on-device.
FAQ
Do I need to buy the new iPhone 18 Pro Max to use Siri AI? No — any iPhone from the 15 Pro onward supports Siri AI once you update to iOS 27. The new hardware runs it faster and enables a few camera-specific features tied to the newer chip, but the core Siri AI experience isn't exclusive to the newest phone.
Can I just replace Siri entirely with Claude or ChatGPT? Not entirely — Extensions let you route specific request types to a third-party model, and you can set one as your default for general requests, but some system-level functions still run through Apple's own Siri AI regardless of your Extensions settings.
Is my personal data shared with Google now that Gemini powers Siri? Apple has stated the Gemini partnership involves using Google's models to power Siri's reasoning, processed under Apple's privacy architecture, rather than routing your personal data to Google directly — but if you're privacy-conscious, it's worth reading Apple's specific privacy documentation for Siri AI before enabling deeper personal-context features.
What happened to the AI health coaching Apple teased? It was scaled back and didn't ship with iOS 27 — reporting suggests Apple pulled the planned Health+ AI agent before the beta released, so anyone upgrading expecting AI health coaching won't find it in this release.
Will iOS 27's AI features work the same on iPad and Mac? Siri AI and Extensions are designed to work across iPhone, iPad, Mac, Apple Watch, and Apple Vision Pro, though exact feature parity (especially anything camera-dependent) will vary by device capability.
Related guides
- ChatGPT vs Claude vs Gemini
- ChatGPT vs Perplexity for Research
- 5 AI Apps to Set as Siri's New Brain on Your iPhone 18 Pro Max
- 5 AI Photo & Video Apps Built for the iPhone 18 Pro Max's New Camera
- Explore Writing & Content tools
*Ratings and pricing reviewed monthly. Last updated September 2026.*
Bogdex · Founder & editor, woska
Bogdex builds and curates woska, testing AI tools against real workflows to judge which ones actually save time rather than which have the longest feature list.