Chen Guangyu reportedly joins Jeff Dean's Discovery Loop
Seventeen‑year‑old AI researcher Chen Guangyu announced on X on October 15 that he was leaving Moonshot AI, thanking colleagues and noting a move to the Bay Area. He did not name a new employer, but multiple reports – including the Apper Grok account that tracks AI talent – identified Discovery Loop, the Jeff Dean‑founded startup, as his destination. As of October 21, Chen had not publicly…
Key points
- Chen Guangyu, 17, co‑authored the Attention Residuals technique used in Moonshot AI’s 2.8‑trillion‑parameter Kimi K3 model.
- Reports and the Apper Grok account say he has moved to Discovery Loop, though neither Chen nor the startup have confirmed.
- Discovery Loop is seeking funding at a target valuation of roughly $50 billion; Moonshot AI plans a Hong Kong listing to raise up to $5 billion.
Chen co‑authored the paper Attention Residuals with Zhang Yu and Su Jianlin, a technique that became part of the core architecture of Moonshot AI’s 2.8‑trillion‑parameter Kimi K3 model released in July. After his departure announcement, Anthropic’s Sholto Douglas invited him to collaborate, which Chen publicly denied. Discovery Loop, founded in August by Jeff Dean, Sanjay Ghemawat, Quoc Le and Oriol Vinyals, is still pre‑product and is reportedly seeking funding at a target valuation of about $50 billion, while Moonshot AI is reportedly preparing a Hong Kong IPO to raise up to $5 billion.
Model page: Kimi K3 →
Moonshot AI's 17-year-old Kimi K3 co-author Chen Guangyu heads to Jeff Dean's Discovery Loop
vectorwire.ai · 22 October 2026
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