Shock in the world of artificial intelligence: Just months after founding Thinking Machines Lab, two key co-founders are leaving OpenAI's former CTO, Mira Murati, to return to... OpenAI.
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Who's Leaving
Barret Zoph
Luke Metz
Both had followed Murati when she left OpenAI in September 2024 to start her own company. Now, less than 18 months later, they are returning to their former employer.
What Happened?
According to sources close to the company, the departures are due to disagreements over the strategic direction of Thinking Machines Lab. Murati reportedly wanted to focus on an “AI safety first” approach, while Zoph and Metz preferred faster product development.
Important: OpenAI reportedly offered “significantly improved packages” to the two researchers to return, including equity and leadership roles.
The Timeline
- September 2024
Mira Murati abruptly leaves OpenAI after 6.5 years. - November 2024
Thinking Machines Lab is announced with $100M seed funding. - December 2024
Zoph and Metz join as co-founders. - January 2026
Both announce their return to OpenAI.
What This Means for Thinking Machines Lab
The loss of two key executives is undoubtedly a blow for the fledgling company. However, Murati still retains significant talent and the $100 million in funding she secured.
"We wish Barret and Luke every success. Thinking Machines Lab continues its mission for safe and reliable AI."
— Thinking Machines Lab Statement
The Bigger Question
Why does OpenAI want back the researchers who left? Sources say the company is facing fierce competition for talent from startups and rivals like Anthropic, Google DeepMind, and xAI.
The return of Zoph and Metz sends a message: OpenAI is willing to pay whatever it takes to maintain its leadership in the field.
What's Next
Murati has not yet made a public statement. Thinking Machines Lab is expected to announce new hires in the coming weeks to fill the gap.
As for OpenAI, the return of two top researchers strengthens its position during a period of intense competition. The AI talent war shows no signs of slowing down.