[Lilian Weng Returns to OpenAI After Leaving Thinking Machines Lab Due to Health Reasons] BlockBeats News, July 30: Thinking Machines Lab co-founder Lilian Weng announced her resignation due to health reasons (repeated illnesses over the past seven months and excessive startup pressure). Just a few days later, she returned to OpenAI. She will lead a team focused on research into 'recursive self-improvement,' a topic she has recently explored in depth on her blog, aiming to develop more powerful systems using AI. Lilian Weng previously served as OpenAI's Vice President of Safety Research and Head of the Applied AI Research team. In early 2025, she co-founded Thinking Machines Lab alongside former OpenAI CTO Mira Murati and others. This swift return highlights the mobility of top AI talent between high-intensity frontier labs. [Original Link]