Does Siri Use Gemini? What iOS 27 Means for AEO

Key takeaways

• Siri AI launched in beta on iPhone 15 Pro and newer. Simple tasks stay on Apple’s own models. Harder questions go through Apple’s Private Cloud Compute, which CNBC reported runs on Google Cloud.
• Apple’s Applebot support page says Siri’s answers to broad questions “may include links to sources,” but it doesn’t say how often. That frequency decides how much traffic this new surface can send back to a website.
• If your content already works for Gemini and Google AI Overviews, that’s a good start for Siri. Apple says Applebot’s crawled data can feed Siri’s web answers, so check that Applebot is allowed in your robots.txt too.
• Code found around the release hints that Apple built Siri AI so its model could be swapped for Claude or ChatGPT. Nothing’s confirmed yet, but it points to more model choice ahead, not less.

Table of contents

• Does Siri use Gemini? What shipped in iOS 27
• What Siri running on Gemini means for AEO
• Does Siri show source links?
• What this means for your own AEO work
• How Web25 helps
• FAQ

Does Siri use Gemini? What shipped in iOS 27

Apple released iOS 27 on Monday, September 14, 2026. It comes with a rebuilt Siri called Siri AI, in beta, for iPhone 15 Pro and newer. You have to turn it on yourself in Settings, and some people land on a waitlist first. It can hold a back-and-forth conversation, read what’s on your screen, and take actions in apps like Mail, Messages, and Calendar.

Apple confirmed its Google deal back in January 2026. Reports put the cost at around $1 billion a year. CNBC reported that Apple uses Gemini to help build its own models, and that Apple’s Private Cloud Compute, used for harder Siri questions, runs on Google Cloud. Apple says none of that data gets stored or seen by Google. Siri AI launched in English only. Apple said French, Japanese, Korean, Portuguese, and Spanish would follow in October, and it’s not launching yet in the EU or China for regulatory reasons. This follows a public beta TechCrunch covered back in July, when Apple first let more testers in.

What Siri running on Gemini means for AEO

Here’s the part that actually matters for AEO. Gemini is the model family behind Google’s AI Overviews and the Gemini app, the ones we’ve already covered in our guide to AEO and our guide to GEO tools and agencies. Apple built its new models on Gemini technology, so Siri is a second doorway into a model family your content might already be reaching, or already missing.

That cuts both ways. If Gemini already cites your site through Google’s own products, that content work is a good base for Siri too, though Apple doesn’t say how Siri picks its sources. But if Gemini ignores your site today, your site is already missing one major surface. Siri’s web answers can also draw on Applebot data, so check that side too.

We wrote recently about Cloudflare’s new default rules for AI crawlers, which decide whether Google’s crawler can even reach your page at all. That question still comes first. If your site blocks the crawlers Gemini trains on, you may be missing Google’s AI surfaces. Siri’s web answers are a different case, because the crawler to check there is Applebot, Apple’s own.

Does Siri show source links?

Apple’s own Applebot support page says Applebot’s crawled data can be used for “answering broad world knowledge questions in Siri and Search that may include links to sources and websites used to help generate the answer.” The page is dated September 4, 2026.

“May include” is the whole promise. Apple doesn’t say how often links appear or how it picks the sources. In June, Search Engine Journal noted that Apple’s press releases “don’t address what websites get back.”

Apple says the crawled data behind those answers comes from Applebot, its own crawler. Publishers can keep content out of these answers with the nosnippet meta tag. They can opt out of training use separately with Applebot-Extended in robots.txt, which Apple says “does not crawl webpages.”

Web25 is our agency, and figuring out which AI surfaces actually matter for a business is part of the AEO/GEO work we do. Want a read on where your site stands with AI search tools? Book a discovery call.

What this means for your own AEO work

On the model side, Siri runs on Apple models built with Gemini technology, so the content work that helps with Gemini is a sensible start. The crawler is different, though. Siri’s web answers can use Applebot data, so let Applebot crawl your pages. The move that already works for Gemini and AI Overviews still applies here: write specific, well-sourced, crawlable content. We cover that in more detail in why AI isn’t citing a given page.

Keep an eye on two things: how often Siri AI actually shows source links as it expands, and whether that code evidence about Claude and ChatGPT turns into a real feature. If it does, “AEO for Siri” could mean tracking three different models inside one assistant instead of one.

How Web25 helps

We track which AI surfaces are actually worth your attention, instead of treating every new AI product as something you need to chase. See our AEO/GEO/SEO service for how we approach it.

FAQ

What to do next

Keep doing the specific, well-sourced content work that already helps with Gemini and Google AI Overviews. Siri AI runs on Apple models built with Gemini technology, so that work is a good base there too. Applebot also needs to be able to crawl your pages. Want a full read on where your site stands with AI search tools? Book a discovery call.

---

Written by Adam Khaled, Founder, Web25. Last updated October 2026.