Musk replies to OpenAI exodus as veteran exec Brad Lightcap exits

Elon Musk gave a one-word reply when he saw the news of another high-level executive leaving OpenAI. Barely 24 hours passed between Musk’s “Wow” reaction to the news that Chloe Bakalar, former head of ethics, was leaving before Brad Lightcap, one of OpenAI’s longest-serving executives, announced his departure. 

Musk has had public spats with the CEO of OpenAI, Sam Altman, since he left the company in 2018. His reply garnered over 12,000 likes by Tuesday. Musk did not expatiate, as the brief reply drew lots of comments.

Why did Lightcap leave OpenAI?

Lightcap informed OpenAI staff of his departure on Tuesday. He reposted his goodbye note on X.

Lightcap served as chief financial officer and chief operating officer during his eight years at the company. He turned his attention to a special projects team in April, reporting directly to Sam Altman. Lightcap described his decision as “bittersweet,” stating he was going “to start something new” without elaborating on his plans.

His stint with OpenAI began in 2018, joining the fledgling AI startup after working at Y Combinator, Dropbox, and J.P. Morgan. Lightcap intends to remain at the company for the next couple of weeks.

OpenAI has not commented so far.

A litany of exits at the top

Lightcap’s exit is not an isolated incident. It comes amid a series of exits at OpenAI. Fidji Simo, who is considered OpenAI’s number-two executive, resigned in July due to health concerns. He’s gone on to join an AI health startup.

The man who ran OpenAI’s Safety Systems team, Johannes Heidecke, stepped down from the company after changes in the structure of the safety and research teams.

Joshua Achiam, who served as OpenAI’s chief futurist, left after nine years in July without stating any specific reason. He vowed to continue the mission  “from outside the walls of a frontier lab.”

This is a pattern that goes way back. Since 2024, a long list of safety and alignment leaders have departed OpenAI. This includes co-founders Ilya Sutskever and Jan Leike and the head of ethics at OpenAI, who joined within the past year.

Why is Musk talking about OpenAI exits ahead of IPO?

The timing adds more meat to the story. The departures come as OpenAI looks toward an IPO.

Typically, investors are secure in the knowledge that a company has stability in its executive team. But the recent events might do the exact opposite. However, the exits could also be explained as part of a growing trend in the AI industry. Recently, Jeff Dean exited Google to start up Discovery Loop, his own AI venture.

As for Altman and OpenAI, the AI lab could have done without this many executive-level departures as it ramps up to its IPO. Musk’s reaction is the latest chapter in the rivalry between him and OpenAI’s Altman, as he builds his own AI company.

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