Within days of joining Meta, Shengjia Zhao, co-creator of OpenAI’s ChatGPT, had threatened to quit and return to his former employer, in a blow to Mark Zuckerberg’s multibillion-dollar push to build “personal superintelligence.”

Zhao went as far as to sign employment paperwork to go back to OpenAI. Shortly afterwards, according to four people familiar with the matter, he was given the title of Meta’s new “chief AI scientist.”

The incident underscores Zuckerberg’s turbulent effort to direct the most dramatic reorganisation of Meta’s senior leadership in the group’s 20-year history.

One of the few remaining Big Tech founder-CEOs, Zuckerberg has relied on longtime acolytes such as Chief Product Officer Chris Cox to head up his favored departments and build out his upper ranks.

But in the battle to dominate AI, the billionaire is shifting towards a new and recently hired generation of executives, including Zhao, former Scale AI CEO Alexandr Wang, and former GitHub chief Nat Friedman.

Current staff are adapting to the reinvention of Meta’s AI efforts as the newcomers seek to flex their power while adjusting to the idiosyncrasies of working within a sprawling $1.95 trillion giant with a hands-on chief executive.

“There’s a lot of big men on campus,” said one investor who is close with some of Meta’s new AI leaders.

Adding to the tumult, a handful of new AI staff have already decided to leave after brief tenures, according to people familiar with the matter.

This includes Ethan Knight, a machine-learning scientist who joined the company weeks ago. Another, Avi Verma, a former OpenAI researcher, went through Meta’s onboarding process but never showed up for his first day, according to a person familiar with the matter.

In a tweet on X on Wednesday, Rishabh Agarwal, a research scientist who started at Meta in April, announced his departure. He said that while Zuckerberg and Wang’s pitch was “incredibly compelling,” he “felt the pull to take on a different kind of risk,” without giving more detail.

Meanwhile, Chaya Nayak and Loredana Crisan, generative AI staffers who had worked at Meta for nine and 10 years respectively, are among the more than half a dozen veteran employees to announce they are leaving in recent days. Wired first reported some details of recent exits, including Zhao’s threatened departure.

Meta said: “We appreciate that there’s outsized interest in seemingly every minute detail of our AI efforts, no matter how inconsequential or mundane, but we’re just focused on doing the work to deliver personal superintelligence.”

A spokesperson said Zhao had been scientific lead of the Meta superintelligence effort from the outset, and the company had waited until the team was in place before formalising his chief scientist title.

“Some attrition is normal for any organisation of this size. Most of these employees had been with the company for years, and we wish them the best,” they added.

Over the summer, Zuckerberg went on a hiring spree to coax AI researchers from rivals such as OpenAI and Apple with the promise of nine-figure sign-on bonuses and access to vast computing resources in a bid to catch up with rival labs.

This month, Meta announced it was restructuring its AI group—recently renamed Meta Superintelligence Lab (MSL)—into four distinct teams. It is the fourth overhaul of its AI efforts in six months.

“One more reorg and everything will be fixed,” joked Meta research scientist Mimansa Jaiswal on X last week. “Just one more.”

Overseeing all of Meta’s AI efforts is Wang, a well-connected and commercially minded Silicon Valley entrepreneur, who was poached by Zuckerberg as part of a $14 billion investment in his Scale data labeling group.

The 28-year-old is heading Zuckerberg’s most secretive new department known as “TBD”—shorthand for “to be determined”—which is filled with marquee hires.

In one of the new team’s first moves, Meta is no longer actively working on releasing its flagship Llama Behemoth model to the public, after it failed to perform as hoped, according to people familiar with the matter. Instead, TBD is focused on building newer cutting-edge models.

Multiple company insiders describe Zuckerberg as deeply invested and involved in the TBD team, while others criticize him for “micromanaging.”

Wang and Zuckerberg have struggled to align on a timeline to achieve the chief executive’s goal of reaching superintelligence, or AI that surpasses human capabilities, according to another person familiar with the matter. The person said Zuckerberg has urged the team to move faster.

Meta said this allegation was “manufactured tension without basis in fact that’s clearly being pushed by dramatic, navel-gazing busybodies.”

Wang’s leadership style has chafed with some, according to people familiar with the matter, who noted he does not have previous experience managing teams across a Big Tech corporation.

One former insider said some new AI recruits have felt frustrated by the company’s bureaucracy and internal competition for resources that they were promised, such as access to computing power.

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