OpenAI Wins Back AI Defectors Amid Firing Allegations and Startup Struggles

In a high-stakes move, two of OpenAI’s most prominent defectors are returning home—after allegations of misconduct and a fledgling AI startup’s collapse.

Barret Zoph and Luke Metz, cofounders of Thinking Machines, are rejoining OpenAI after leaving in late 2024 to start the AI lab with Mira Murati. A report by technology journalist Kylie Robison states:

'Zoph was fired for “unethical conduct.”'

OpenAI’s CEO of applications, Fidji Simo, confirmed Zoph’s return in a memo, stating the company 'doesn’t share the same concerns about Zoph as Murati.'

Sam Schoenholz, another Thinking Machines staffer, is also rejoining OpenAI. Zoph informed Murati of his intent to leave Monday before being terminated; OpenAI’s move follows the recent departure of VP of research Jerry Tworek.