For years, Siri has lagged behind competitors like Google Assistant and Amazon Alexa. While Apple positioned itself as a leader in privacy and ecosystem integration, its virtual assistant remained fundamentally limited—unable to handle multi-step commands, retrieve context from personal data, or understand nuanced queries. The company first promised a supercharged Siri at WWDC 2024 as part of its broader Apple Intelligence initiative, but two major iOS releases came and went without the breakthrough. Now, finally, at WWDC 2026, Apple has unveiled a fully revamped Siri powered entirely by AI models, which it is calling Siri AI.

According to hands-on impressions from developers attending the conference, Siri AI marks a genuine turning point. It can now process complex requests that involve chaining together multiple actions, such as 'Find the email from Sarah about the project deadline, add that date to my calendar, and send a reminder to my team.' It can also reference information stored across Messages, Notes, Photos, and Mail, understanding context without requiring explicit file names. The new system relies on Apple Foundation Models that run locally on the device for privacy and speed, with more demanding queries offloaded to Apple's Private Cloud Compute infrastructure. Apple claims that cloud-based processing remains fully end-to-end encrypted, ensuring that no third party—including Apple—can access user data.

However, not every iPhone will get Siri AI. Apple has confirmed that the feature is exclusive to devices that already support Apple Intelligence. That means the iPhone 15 Pro and iPhone 15 Pro Max, the entire iPhone 16 series, the iPhone 16e, the iPhone 17 lineup, and the upcoming iPhone 18 series (expected in September 2026) are all eligible. The iPhone 11 through iPhone 15 non-Pro models, despite running iOS 27, will not see the new Siri. This limitation stems from hardware requirements: Apple Intelligence demands a Neural Engine capable of at least 16-core performance and a minimum of 8 GB of RAM, which only Pro-tier iPhones have had since the iPhone 15 generation.

Apple has also announced that iPad and Mac models with Apple silicon—including the M1, M2, M3, and M4 chips—will also support Siri AI. The 2024 iPad mini, which shares the same A17 Pro system-on-a-chip as the iPhone 15 Pro, is included. For users unsure about compatibility, Apple recommends checking the Settings app. If the Apple Intelligence & Siri section appears, the device is ready for the upgrade.

Beta rollout and opt-in required

Interestingly, Apple has stated that Siri AI will initially debut as a beta feature within iOS 27. Users will need to manually opt in from the Settings app and join a waitlist, similar to the process for earlier iOS 27 developer betas. This cautious approach suggests Apple wants to stress-test the model's performance and privacy safeguards before a wider release. Compatibility with iOS 27 itself, meanwhile, reaches all the way back to the iPhone 11, which is likely Apple's final major OS update for that generation. So even if you own an older iPhone, you can still get the latest version of iOS—just not the new Siri.

Performance differences between models

While all Apple Intelligence–compatible iPhones will run Siri AI, the experience is not equal across the board. Apple has confirmed that iPhone 17 Pro, iPhone 17 Pro Max, and the new iPhone Air—which reportedly shares the same high-end chip—will benefit from a more powerful on-device AI model. This larger model enables expressive voices for Siri, improved speech recognition accuracy in noisy environments, and faster dictation. It can also handle more complex on-device processing without resorting to the cloud, which improves latency and offline functionality.

The upcoming iPhone 18 Pro and the rumored iPhone Fold, expected later in 2026, will also include this upgraded on-device model. However, it remains unclear whether the base model iPhone 18 will have it. Analyst Ming-Chi Kuo has reported that Apple plans to increase the memory of non-Pro iPhones to 9 GB, but Apple's documentation states that the most powerful on-device AI models require at least 12 GB of RAM. That suggests that only Pro models with 12 GB or more will see the full enhancement. The standard iPhone 18 might get Siri AI but with the same performance as the iPhone 15 Pro, not the premium tier.

What does this mean in practice? During testing at WWDC, the superior on-device model on the iPhone 17 Pro allowed Siri to transcribe voice messages almost instantly, recognize accents and dialects with high accuracy, and deliver responses in a natural, varied tone. The base Apple Intelligence model already handles personal context well, but the advanced version feels noticeably quicker and more conversational. For users who heavily rely on voice commands for productivity, the investment in a Pro-tier iPhone could make a tangible difference.

Beyond iPhones, Apple's Mac lineup with M4 chips will also have access to the enhanced model, while M1–M3 Macs will run the standard version. On iPad, only the iPad Pro with M4 and the upcoming iPad Air with M3 or later are expected to support the advanced on-device features. The iPad mini (2024) will run the standard model.

A long-awaited maturity for Apple Intelligence

When Apple Intelligence was first announced in 2024, the features that shipped were underwhelming: notification summaries, image generation in Messages, and a few writing tools. None of them dramatically changed how users interact with their devices. Siri remained the same. Developers and consumers grew skeptical that Apple's AI vision was merely a marketing exercise. The launch of Siri AI, however, feels like the first real fulfillment of that promise.

During the keynote, Apple demonstrated Siri processing a request that involved cross-referencing a user's calendar, email attachments, and a note about dietary preferences to suggest a restaurant for a business dinner. The assistant then drafted a text message invitation and added a reminder to check availability. The entire chain happened in seconds, without the user needing to unlock the device or navigate through multiple apps. That level of integration is unprecedented for Apple and brings Siri much closer to the kind of agentic AI that rivals like Google and OpenAI have been pursuing.

Behind the scenes, Apple's Foundation Model has been trained on a curated dataset that emphasizes factual accuracy and privacy. The cloud portion uses differential privacy techniques and data isolation protocols that Apple has refined over the past decade. The on-device model, meanwhile, is optimized for the Neural Engine, consuming less than 1 GB of RAM for the standard version. Apple has also designed a 'fallback' mechanism: if the device cannot process a query locally—either because it lacks the advanced model or because the request is too complex—it seamlessly hands off to Private Cloud Compute without any user intervention. The entire process is transparent, with a small icon in the status bar indicating whether the processing is local or cloud-based.

But the most significant change may be Siri's new ability to learn from user behavior over time. Apple says the assistant will adapt to your speech patterns, common queries, and preferred apps. This personalization stays on-device and can be reset at any time. Privacy advocates have praised the approach, noting it avoids the cloud-based profiling that competing assistants rely on.

Despite these advances, Siri AI arrives nearly two years later than originally promised. Apple's initial roadmap for Apple Intelligence at WWDC 2024 included a 'super smart Siri' that would ship with iOS 18. That never materialized. iOS 19 and iOS 20 also failed to deliver the upgrade. Only now, with iOS 27, is the feature reaching beta. Analysts attribute the delay to the difficulty of building large language models that respect Apple's strict privacy standards while still being competitive in performance. The company also reportedly faced internal reorganizations of its AI division after the departure of several key executives. Nevertheless, those who have used the beta agree that the wait was worth it, at least on modern hardware.

For users holding onto iPhone 12 or iPhone 13 handsets, the new Siri is likely a compelling reason to upgrade. Older iPhones already struggle with existing Apple Intelligence features like image generation, and the Neural Engine on the A14 and A15 chips cannot handle the new Foundation Model. Apple has not indicated any plans to backport Siri AI to older hardware. However, the company has announced that future iOS updates will continue to improve the assistant's offline capabilities and expand its integration with third-party apps via the new App Intents framework. Developers can already start building custom Siri actions using a new API that supports multi-step workflows.

As the fall release approaches, users can check device compatibility and sign up for the beta through the Apple Developer Center or the public beta program later this summer. Whether you're a longtime Apple user or a recent convert, Siri AI may finally turn the virtual assistant into the truly helpful tool that the iPhone has been missing for over a decade. Only those with the right hardware will experience it at its full potential, but for the first time, Siri feels like it belongs in the future.

Source: Engadget News