<ul data-eligibleForWebStory="false">Apple's top AI models executive, Ruoming Pang, leaves for Meta in latest setback.Meta's hiring spree includes major AI leaders, offering lucrative packages to secure talent.Mark Zuckerberg prioritizes AI at Meta in race against rivals like OpenAI and Google.Pang's departure highlights heightened competition for top AI talent between tech giants.Internal discussions at Apple suggest exploring third-party models for new Siri version.