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Musk's behavior caused 'huge damage' to OpenAI: Sam Altman
Altman testified in Musk's lawsuit against OpenAI

Musk's behavior caused 'huge damage' to OpenAI: Sam Altman

May 13, 2026
11:37 am

What's the story

OpenAI CEO Sam Altman has claimed that Elon Musk's behavior caused "huge damage" to the culture of his artificial intelligence start-up. The revelation came during a testimony in Musk's lawsuit against OpenAI. Altman claimed that Musk had asked OpenAI president Greg Brockman and chief scientist Ilya Sutskever to rate researchers based on their achievements and "take a chainsaw through a bunch."

Management clash

Altman explains why Musk's approach didn't work

Altman acknowledged that Musk's aggressive management style was well-known, but it didn't fit with the culture of his start-up. "I don't think Mr. Musk understood how to run a good research lab," he said during his testimony. He further explained that for a research lab where psychological safety and time to explore an idea are essential, Musk's approach of expecting quick results and threatening termination if they weren't up to par didn't work.

Departure effects

Musk left OpenAI in 2018 to avoid conflict of interest

Musk co-founded OpenAI in 2015 with Altman and Brockman but left the start-up in 2018. At the time, it was said that Musk's exit was to avoid a conflict of interest with Tesla's machine learning work. During the testimony, Altman said that Musk's departure "was a morale boost in some ways," letting employees know they no longer had to "work this way anymore."

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Legal battle

Musk's lawsuit against OpenAI explained

Musk's lawsuit claims that OpenAI has strayed from its original mission of benefiting humanity. He also alleges that Altman and Brockman deceived him into investing in the start-up. The trial is now in its third week with testimonies from several important witnesses including Brockman, former OpenAI board member Shivon Zilis, Microsoft CEO Satya Nadella, and former CTO Mira Murati.

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