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Meta
2026-10-12 03:03:53

Alexandr Wang lays out how Meta built Muse and why he left Scale AI

Meta Chief AI Officer Alexandr Wang has given one of his most detailed accounts yet of how Muse, the company’s personal AI agent, went from concept to launch in seven months. In an interview with Founders host David Senra, Wang said the internal conviction behind Muse took shape after hands-on experiments with OpenClaw, including Nat Friedman using it to track whether he was drinking water and Wang himself letting an agent analyze his emails, photos, and other personal data in what he described as an experience similar to compressing three years of therapy into one session. Those tests helped persuade Meta leaders that a long-running personal agent could become a major consumer product, not just another chatbot. Wang said Meta had already set a broader “Personal Superintelligence” vision when Meta Superintelligence Labs was established in 2025. By February 2026, both he and Friedman had written memos to the board arguing for the category. Meta then built an initial Muse prototype in roughly one to two weeks, but spent seven months refining it before release, using a spreadsheet with more than 100 capability and behavior checks. According to Wang, Muse was not launched until the specially trained Muse Spark 1.3 model cleared all key evaluations. He also explained why Meta did not put its full weight behind coding agents, how Zuckerberg approached him after Llama 4 disappointed internally, and why MSL now uses an unusually flat structure with more than 200 researchers reporting directly to him.

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Alexandr Wang lays out how Meta built Muse and why he left Scale AI
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