Huo Xing Cai Jing reports that on July 30, Lilian Weng, co-founder of Thinking Machines Lab, resigned due to health reasons—having been repeatedly ill over the past seven months and under excessive entrepreneurial pressure—only to return to OpenAI just days later. She will lead a team focused on research into “recursive self-improvement,” a topic she recently explored in depth on her blog, aiming to leverage AI to develop more powerful systems. Weng previously served as Vice President of Safety Research and Head of the Applied AI Research team at OpenAI. In early 2025, she co-founded Thinking Machines Lab alongside former OpenAI CTO Mira Murati and others. Her swift return underscores the high mobility of top AI talent between intense, cutting-edge laboratories.
Lilian Weng returns to OpenAI after leaving the Thinking Machines Lab for health reasons.
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Summary
Lil Weng, co-founder of Thinking Machines Lab, departed the firm on July 30, 2026, citing health concerns and startup-related stress. She has since rejoined OpenAI to lead a team researching "recursive self-improvement," a topic she has written about extensively. Weng previously led OpenAI’s safety research and applied AI teams. She co-founded Thinking Machines Lab in early 2025 with Mira Murati. Traders are analyzing this move using technical analysis for crypto to assess its impact on the risk-to-reward ratio in AI-driven markets.
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