John Giannandrea, Apple’s AI chief, is stepping down amid challenges with the company’s Siri voice assistant. His departure comes after Apple delayed the launch of a more personalized Siri earlier this year, acknowledging that the process is taking longer than expected. Reports indicate that Tim Cook, Apple’s CEO, has lost confidence in Giannandrea's leadership within the AI team. He will continue in an advisory role until his retirement in spring 2026. Amar Subramanya, formerly a corporate VP of AI at Microsoft after a long tenure at Google, will take over as Apple’s vice president of AI. His responsibilities will include the development of AI models, machine learning research, and ensuring AI safety at Apple. Subramanya's experience in integrating AI into products is seen as vital for Apple’s future AI features. He will report to Craig Federighi, Apple’s software senior vice president, who has been managing the company’s AI initiatives. Apple plans to launch the updated Siri next spring, potentially powered by a custom version of Google’s Gemini AI model. This shift in leadership and the upcoming product release highlight Apple’s ongoing efforts to enhance its AI capabilities, particularly in response to increasing competition in the space.