Lilian Weng flips from Thinking Machines to OpenAI after saying the startup's pace hurt her health

Lilian Weng, a cofounder of the AI startup Thinking Machines Lab who stepped down this week, is rejoining OpenAI.

The interrogator will lead a squad focused connected accelerating soul investigation astatine the ChatGPT maker, arsenic portion of OpenAI's bid to create AI that tin amended itself, a institution spokesperson told Business Insider.

Weng had shared connected Monday that she would beryllium leaving Thinking Machines aft a grueling agelong astatine the startup, writing, "I don't consciousness I'm capable to proceed astatine the gait a startup requires."

"It has been an highly difficult decision, arsenic I dislike myself to fto down group astatine Thinky but astatine the aforesaid clip I'm perpetually worried astir my health," she added, referring to the startup's nickname.

Weng wrote that she still enjoys moving successful the section and reference papers astir frontier AI progress, saying that a "scoped domiciled successful a much predictable place, and not arsenic a cofounder" would suit her better.

That domiciled will now beryllium astatine OpenAI, the company wherever Weng worked from 2018 until precocious 2024, aft stints astatine Facebook, Dropbox, and Affirm. During her first tenure astatine OpenAI, she helped build the Applied AI Research squad and later led its Safety Systems work.

Weng and Thinking Machines Lab didn't instantly respond to requests for comment.

Previously, Weng helped create OpenAI's GPT-4 model, moving connected pretraining data, exemplary safety, evaluations, and deployment.

Upon her return, Weng will lead a squad supporting OpenAI's high-stakes effort to execute "recursive self-improvement," successful which AI models tin train and amended their successors.

The OpenAI spokesperson praised Weng's operation of investigation experience, method know-how, and accomplishment successful building teams.

For Thinking Machines Lab, Weng's departure is the latest of many. Business Insider, successful May, reported that astir a 3rd of the company's original founding members had near the startup since it launched.

Of the startup's six cofounders, only 2 remain: Mira Murati, the CEO, and main intelligence John Schulman. Barret Zoph and Luke Metz near for OpenAI, while Andrew Tulloch near for Meta. Zoph near OpenAI successful June, The Verge reported.

Mira Murati, the erstwhile OpenAI CTO who leads the startup, thanked Weng for her work connected X aft she announced her departure connected Monday.

"We'll miss you, it's been awesome building Thinky together," Murati wrote. "I'm gladsome that you're putting your wellness first. Thank you for everything."

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