Apple Explains Siri AI Version Delay in iOS 27: Mike Rockwell Addresses It

Apple officially explained why the updated AI version of the Siri voice assistant as part of iOS 27 was released later than initially expected — Mike Rockwell, the head of the Siri division, provided details at a technical press session following the WWDC presentation.

Who is Mike Rockwell

Mike Rockwell took over the Siri engineering team in 2025 after an internal Apple reorganization. Before that, he led the development of visionOS and the Vision Pro headset — meaning he came to the Siri project not from John Giannandrea's classical machine learning team, which originally oversaw the voice assistant, but from the product engineering side. This personnel shift alone signaled recognition that the previous approach to developing the AI version of Siri did not allow meeting the originally announced timelines.

• The updated version of Siri with AI features is being released as part of iOS 27
• The official explanation for the delay was delivered at a press session following WWDC
• Commentary was provided by Siri division head Mike Rockwell
• Rockwell took over the Siri team in 2025, previously responsible for visionOS and Vision Pro

Why Siri updates have been delayed so long

The story of AI-powered Siri traces back to the WWDC 2024 presentation, when Apple announced a personalized assistant with screen-context understanding and the ability to perform actions within applications. The rollout of these features was postponed several times, and throughout 2025 Apple was unable to deliver them in the originally promised form. According to media reports, the reasons were difficulties with restructuring Siri's architecture for large language models and Apple's internal requirements for the quality and reliability of the assistant's responses — Apple was not ready to release a version that did not meet its own standards.

The situation was further complicated by parallel discussions regarding Apple's partnerships with external model providers: the company considered using third-party large language models for some Siri functions, which required additional coordination and testing alongside internal development. By the time of the iOS 27 presentation at WWDC, Apple clearly decided to directly and publicly state the reasons for the delay rather than leave users and developers without explanation, as had happened with previous postponements.

For Apple, the situation is particularly sensitive against the backdrop of broader criticism of its AI strategy: since announcing Apple Intelligence in 2024, the company has regularly been criticized for lagging behind competitors like Google and OpenAI in deploying generative AI to its own products. The public explanation for Siri's delay at the technical press session — an attempt to shift the tone of the conversation: demonstrating that the delay resulted from a deliberate decision not to release a crude product rather than lack of progress within the company.

What this means

The prolonged modernization of Siri demonstrates how difficult it is for large technology companies to integrate generative AI into already existing, years-refined products — Apple had to not merely update functionality but rebuild the team and approach to developing the voice assistant from scratch.