Apple’s new Siri in iOS 27 brings the biggest upgrade the voice assistant has received in years, but the company needed more time than expected to deliver it. During a recent media briefing focused on Siri and Apple Intelligence, Apple executive Mike Rockwell explained why the project took longer to reach users.
According to Rockwell, Apple initially built an early version of Siri AI by adding new capabilities on top of the existing Siri platform. While that version supported features such as tool calling, the company felt it did not meet the experience and long-term vision it wanted for users.
Apple Chose a Full Rebuild Instead of an Incremental Update
Mike Rockwell explained that Apple ultimately decided to abandon its original approach and start over with a more ambitious redesign.
“Last year, we had actually built a first version of this that was sort of incremental on top of the original Siri that added tool calling, and we had it working. But we didn’t feel it was really delivering on the vision and the experience that we wanted to do. We also had a design, which required much more extensive changes, and we decided to go with that. So we went back, and we rebuilt Siri from the ground up, literally, tore it to the ground, rebuilt it from the ground up.”
Rockwell’s comments reveal that Apple prioritized a larger transformation rather than shipping a quicker update. The company rebuilt Siri on top of new AI models and created a system that works consistently across iPhone, iPad, Mac, Apple Watch, Vision Pro, CarPlay, and AirPods.
The new Siri also introduces a native multimodal architecture and privacy-focused design. Apple believes this new foundation enables a far more capable assistant and provides a unified experience across its entire ecosystem. Based on Rockwell’s remarks, the delay came from Apple’s decision to replace the old Siri framework with a completely new platform rather than continue building on aging technology.
