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WorkThe story, in brief

Thinking Machines co-founder Lilian Weng left the company citing health reasons, then joined OpenAI

Lilian Weng returns to OpenAI after health-driven exit from Thinking Machines co-founder role

Reporting by TechCrunch AI 1 min brief
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The KeyNews take

Why it matters

Notable personnel move between AI labs signals shifting priorities in AI safety research leadership. Weng's return to OpenAI as a returning executive represents consolidation of talent at the frontier labs.

The key facts

6 to know

  1. Lilian Weng left Thinking Machines co-founder role citing health reasons

  2. Weng rejoined OpenAI after departure

  3. Previously served as VP of AI Safety Research at OpenAI

  4. Timeline: July 29, 2026

  5. Weng rejoined OpenAI (previously VP of AI Safety Research there)

  6. Published July 29, 2026

Go to the source

TechCrunch AItechcrunch.com

Publisher excerpt: Weng previously served as the VP of AI Safety Research at OpenAI.
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