Revolutionizing Siri: What to Expect from iOS 27 Update

With all the buzz around iOS 27, it’s easy to forget that Apple is still quietly working on updates for iOS 26. After all, even with the first iOS 27 public beta landing last week, it’s only the eager beavers who have jumped into this year’s big software release already. Hundreds of millions of iPhones are still on iOS 26, and will stay there until at least the fall, when Apple starts pushing iOS 27 to the world at large.

The iOS 27 betas may keep grabbing the spotlight, but Apple also quietly released a new set of betas for iOS 26.6 this week, an update that will likely be the last point release for iOS 26 — especially since any iPhone that can run iOS 26 will also be able to run iOS 27 when it arrives.

As you might expect this late in the cycle, there are only a handful of smaller changes in iOS 26.6, but this week’s Release Candidate, or RC build — which is the final one before Apple turns the key on a public release — has one important feature that could save you a lot of time when September rolls around.

Laying the Foundation for Siri AI

As you’re probably aware by now, iOS 27 will bring a completely redesigned — and far more intelligent — Siri assistant to your iPhone. Dubbed “Siri AI,” it’s the biggest upgrade we’ve seen to Siri in… well, ever. Siri will finally be able to answer questions without sending you to a web page, and there’s even a new Siri chatbot-style app.

It’s going to maintain some professional boundaries compared to the likes of ChatGPT, but it will be able to carry on normal conversations to help you solve problems, get answers to real-world questions, and simply explore new ideas.

However, the biggest change to Siri isn’t just its new cosmopolitan knowledge. Apple is also delivering on the promise it made two years ago to bring “personal context” into the mix.

Siri won’t just be able to answer your questions about the world; it will be able to answer your questions about your own life — at least insofar as it can glean it from the apps and data stored on your iPhone.

For example, you can ask it questions about upcoming reservations, flights, travel plans, or even major milestones in your past and it will scour your messages, emails, calendar, photos, and more to piece together an answer — and it’s already remarkably good at it. For example, even back in the first iOS 27 developer beta, I was able to get Siri to tell me what my daughter and I did for her 10th birthday — nearly seven years ago — or precisely when my feline companion died in 2016.

It didn’t nail every answer on day one, but that’s actually because there’s still a hidden catch to personal context: Siri needs to know about it, and to do that, it has to be primed to quickly and efficiently access what could be a decade or more of information on your iPhone without spending minutes or hours sifting through all that.

Apple’s secret sauce for this is a new semantic index. When you ask Siri a question, it won’t spend time digging through all your information; instead, it checks an index that’s been specifically designed to build all the necessary semantic connections between your data. This allows Siri to come up with impressively fast responses. But it can only do this once that index has been built.

Anyone who has already dived into the iOS 27 betas knows that might take a while. In my case, the indexing from developer beta 1 hadn’t even finished when the second beta came along two weeks later. That’s why my early questions didn’t always come up with conclusive answers.

For example, when I first asked about my cat, Siri was able to infer some information from messages it found where I discussed Piccolo in 2021 and 2023, but it wasn’t until much later that it nailed the date on the first try — once it had indexed all the way back to the beginning of my message and email history. At that point, it found a conversation with my dad from 2016 and the bill from the veterinary clinic.

Needless to say, many folks who upgrade to iOS 27 in the fall could face the same long wait before Siri is prepared to map out their life, so Apple has taken a big step in iOS 26.6 to give it a head start: after installing iOS 26.6, your iPhone will begin building the semantic index right away, giving it a few weeks to finish before iOS 27 rolls out.

That’s not to say that iOS 27 won’t also need to do some indexing once folks upgrade to that final release. So far, every developer beta has kicked off a new “Optimizing Search and Siri” phase, but those also seem to run shorter, as it’s likely updating the indexes instead of regenerating them from scratch. So, even if iOS 27 needs to do the same in September, having iOS 26.6 on your iPhone first should reduce the indexing window from weeks to only days or hours.

With the final Release Candidate now available, we should see the public release of iOS 26.6 within the next week or so. While it’s also likely to include some security fixes, Apple doesn’t publish those until the final release, but even leaving those aside, getting iOS 26.6 on your iPhone now is a great way to pave the way for Siri AI in iOS 27.