Apple Inc. has experienced the departure of its fourth artificial intelligence (AI) researcher within a month, with Bowen Zhang, a key multimodal AI expert from Apple's Foundation Models Group, joining Meta Platforms Inc.'s newly formed Superintelligence team. Zhang had been a central figure in Apple's AI foundation models efforts. This series of exits marks a notable challenge for Apple’s AI ambitions, as the company’s AI team faces ongoing flux despite marginal pay increases. Meta's Superintelligence team has attracted multiple top AI talents from Apple, signaling intensified competition in the AI talent market between the two tech giants. The departures follow earlier exits, including the head of Apple's foundation models team, who left for a $200 million compensation package. Reports also indicate Apple may consider shifting to third-party AI models to remain competitive. Meanwhile, Meta CEO Mark Zuckerberg continues to aggressively build his AI team, although some high-profile offers, including a reported $1 billion proposal, have been declined by other AI experts.