Barret Zoph Departs OpenAI Again After Just Five Months

Barret Zoph has left OpenAI once more, barely five months after rejoining the company in January 2026. His short return, following a period as co-founder of Thinking Machines Lab—a competitor launched by former OpenAI CTO Mira Murati—adds another twist to the ongoing leadership flux at the AI powerhouse. Zoph originally departed OpenAI in late 2024 to help establish Thinking Machines Lab, but made an unexpected comeback at the start of 2026. At the time, OpenAI framed his return as a key move to strengthen its AI research and product development teams. Now, sources indicate that Zoph's exit was amicable, though neither he nor OpenAI have provided detailed public comments. This resignation continues a pattern of high-profile departures and returns at OpenAI, which has seen several senior figures cycle between the company and external ventures. As the AI industry confronts talent retention challenges, Zoph's departure underscores how even short-term arrangements can reshape the competitive landscape. It remains unclear whether Zoph will rejoin Thinking Machines Lab or pursue other opportunities.

via The Verge AI