Lilian Weng stories

Jul 29, 2026

Lilian Weng rejoins OpenAI after leaving Thinking Machines citing health concerns

Lilian Weng, co-founder of Thinking Machines who announced her departure citing startup stress and health reasons, has joined OpenAI.

Jul 29, 20262 sources

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Jul 28, 2026

Lilian Weng steps down from Thinking Machines Lab citing startup stress

Lilian Weng, cofounder of Thinking Machines Lab and former OpenAI safety researcher, stepped down from the startup citing stress and illness related to the pace required by startup work.

Jul 28, 20262 sources

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Featured Stories

OpenAI pauses development of Astra AI model over critical cybersecurity capability concerns

Aug 7, 20262 sources