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Meta has a hit AI app, and a 29-year-old billionaire is getting the credit. The Meta Muse app<\/a>, which performs multi-step tasks and runs actions in the background for users, passed 5 million U.S. downloads 22 days after its Sept. 8 launch, according to Mashable<\/a>. And Meta\u2019s stock is up nearly 20% since Muse debuted.<\/p>\n Now all eyes are on Muse mastermind Alexandr Wang, the MIT dropout who co-founded data-labeling startup Scale AI and became one of the world\u2019s youngest self-made billionaires. Mark Zuckerberg recruited him in June 2025 after Meta invested $14 billion for a 49% stake in Scale. Wang is now Meta\u2019s first Gen Z senior executive, the Wall Street Journal<\/a> reports. <\/p>\n You wouldn\u2019t know it looking at him. Wang wore a thrift-store camo tee and Crocs onstage at Meta\u2019s developer conference and flooded X with Muse memes, some showing the app\u2019s blob mascot in suggestive poses. Wang\u2019s actions have irked employees, particularly over sky-high pay packages for his elite TBD Lab hires. \u201cIt\u2019s going to ruffle some feathers,\u201d Scale board member Mike Volpi tells the Journal.<\/p>\n<\/p><\/div>\n Meta has a hit AI app, and a 29-year-old billionaire is getting the credit. The Meta Muse app<\/a>, which performs multi-step tasks and runs actions in the background for users, passed 5 million U.S. downloads 22 days after its Sept. 8 launch, according to Mashable<\/a>. And Meta\u2019s stock is up nearly 20% since Muse debuted.<\/p>\n Now all eyes are on Muse mastermind Alexandr Wang, the MIT dropout who co-founded data-labeling startup Scale AI and became one of the world\u2019s youngest self-made billionaires. Mark Zuckerberg recruited him in June 2025 after Meta invested $14 billion for a 49% stake in Scale. Wang is now Meta\u2019s first Gen Z senior executive, the Wall Street Journal<\/a> reports. <\/p>\n You wouldn\u2019t know it looking at him. Wang wore a thrift-store camo tee and Crocs onstage at Meta\u2019s developer conference and flooded X with Muse memes, some showing the app\u2019s blob mascot in suggestive poses. Wang\u2019s actions have irked employees, particularly over sky-high pay packages for his elite TBD Lab hires. \u201cIt\u2019s going to ruffle some feathers,\u201d Scale board member Mike Volpi tells the Journal.<\/p>\n<\/p><\/div>\n