Noesion Radarnoesion.ai
Market2026-07-29

Lilian Weng, a co-founder of Mira Murati's startup Thinking Machines, announced on July 27, 2026 that she was stepping down, citing health reasons in an internal Slack message she also posted on X: "the amount of consistent stress and workload have pushed me beyond what my health can sustain physically." On Wednesday, July 29, OpenAI confirmed to TechCrunch that Weng would rejoin the company, where she had previously been VP of AI Safety Research. An OpenAI spokesperson said she will lead a top-level team focused on accelerating the company's internal research, supporting cross-research work on recursive self-improvement. Murati publicly replied to Weng's post in support of her decision; it is unclear whether she knew Weng would return to OpenAI.

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