Apple’s push to transform Siri into a next-generation AI assistant is facing a critical setback: the departure of some of its most experienced hands. Stuart Bowers, a high-ranking executive deeply involved in Siri’s development, has joined Google’s DeepMind, where he will now contribute to the Gemini AI models—potentially the same foundation powering Siri’s upcoming overhaul in iOS 26.4.
His exit follows a wave of losses in Apple’s AI and design teams, including four researchers—Yinfei Yang, Haoxuan You, Bailin Wang, and Zirui Wang—who have also left the company. These departures come just months after Apple lost four senior executives in December, including its AI chief, John Giannandrea, who was replaced by Microsoft’s Amar Subramanya. The exodus extends beyond Cupertino’s internal teams, as Apple’s core iPhone design talent—once the envy of the industry—has increasingly gravitated toward OpenAI’s newly acquired io division, now under the leadership of Jony Ive.
The Siri Overhaul’s Hidden Weakness
The timing of Bowers’ departure is particularly telling. Apple is preparing to roll out a revamped Siri in iOS 26.4, expected to enter beta in February and reach users by March or April. The update promises deeper integration with Apple’s on-device AI capabilities, but the loss of Bowers—who reported directly to Siri head Mike Rockwell—raises questions about whether the project can maintain its momentum. His expertise in AI-driven voice assistants now resides at DeepMind, where he will work on the very models that may underpin Siri’s next evolution.
This isn’t an isolated incident. Over the past month alone, OpenAI’s io division has poached approximately 40 Apple engineers, including Matt Theobald, a manufacturing design expert, and Cyrus Daniel Irani, a lead in human interface design. Even Abidur Chowdhury, the designer behind the iPhone Air and a rising star within Apple, has departed for an unnamed AI-focused startup.
A Broader Talent Drain
The exodus isn’t limited to AI and hardware. In December, Apple announced the departures of its general counsel, Kat Adams, and its vice president for Environment, Policy, and Social Initiatives, Lisa Jackson—both high-profile roles that reflect broader leadership instability. Meanwhile, Meta has also made inroads, luring Alan Dye, Apple’s head of UI design, away from Cupertino.
These losses come at a pivotal moment for Apple. The company is doubling down on AI, with iOS 26.4 set to introduce on-device processing for Siri and other features. However, the repeated departure of key personnel—particularly in AI research and product design—suggests that Apple’s ability to retain top talent is becoming a liability. Competitors like Google, Meta, and OpenAI are aggressively recruiting, offering enticing opportunities in cutting-edge AI and hardware innovation.
What’s Next for Siri and Apple’s AI Ambitions
The question now is whether Apple can compensate for these losses. The company has already taken steps to restructure its AI leadership, bringing in Subramanya from Microsoft. Yet, without a steady pipeline of talent, even the most ambitious projects—like Siri’s transformation—risk stalling. For now, the focus remains on delivering iOS 26.4 on schedule, but the long-term impact of this exodus could reshape Apple’s competitive edge in AI.
One thing is clear: the war for AI talent is intensifying, and Apple’s once-unassailable reputation as a magnet for top engineers is being tested like never before.
