Barret Zoph leaves OpenAI again after just five months

Barret Zoph is out at OpenAI again after just five months

Barret Zoph rejoined OpenAI in January after co-founding Mira Murati's Thinking Machines Lab, and is now out again. He previously spent over five years at OpenAI as an early post-training lead. The post doesn't spell out why he left this time; neither OpenAI nor Zoph commented. A short stint like this between direct competitors usually signals more than a technical disagreement.

Why it matters: Barret Zoph was an early core figure in post-training optimization at OpenAI. Leaving again after just five months, with a stint at Thinking Machines Lab in between, is a strong personnel signal. But the article lacks a reason, so the information is thin, keeping the score bel...