Musk v. Altman live updates: Closing arguments after testimony wraps up, deliberation ahead

ByABC7 Bay Area Digital Staff and Frances Wang KGO logo
Last updated: Thursday, May 14, 2026 2:54PM GMT
Musk v. Altman: Last day of testimony in the liability phase

OAKLAND, Calif. (KGO) -- Technology tycoons Elon Musk and Sam Altman are facing off in a high-stakes trial revolving around the alleged betrayal, deceit and unbridled ambition that blurred the bickering billionaires' once-shared vision for the development of artificial intelligence.

The trial centers on the 2015 birth of ChatGPT maker OpenAI as a nonprofit startup primarily funded by Musk before evolving into a capitalistic venture now valued at $852 billion.

The civil lawsuit accuses Altman, OpenAI's CEO, of double-crossing Musk by straying from the company's founding mission to be an altruistic steward of the technology.

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Last day of testimony before closing arguments

A marine layer hung over Oakland on Wednesday, the last day of testimony in the liability phase of Elon Musk's lawsuit against artificial intelligence company OpenAI and its CEO and president -- Sam Altman and Greg Brockman, respectively.

Musk contends that under the leadership of Altman and Brock, the company -- founded as a nonprofit charitable enterprise to benefit humanity not individual profit -- has been turned into a massive wealth machine for the benefit of insiders and co-defendant Microsoft.

U.S. District Judge Yvonne Gonzalez Rogers, the trial judge, divided the trial into two phases. In the first phase (which is now ending), the jury will determine whether the defendants are liable on Musk's claims that OpenAI, Altman and Brockman have breached a charitable trust and were unjustly enriched, and if so whether Microsoft aided and abetted the breach.

The jury is technically an advisory jury, and its verdict is not binding on Gonzalez Rogers, though she said she would very likely follow it.

In the second phase, the judge -- without input from the jury -- will determine what damages or remedies will be imposed for any liability found in the first phase. Musk has requested disgorgement (that is, payment) of up to $134 billion by the defendants.

In addition, Musk has asked for nonmonetary relief that would oust Altman and Brockman and unwind prior transactions as needed so the initial charitable mission can be fulfilled.

Shortly before the trial began, Musk disavowed any interest in obtaining any monetary amounts to be disgorged for himself; he says they should go to what he referred to as "the OpenAI charity," though how that will work is yet to be explained. Gonzalez Rogers hasn't yet ruled on the extent that Musk can pursue the non-monetary remedies.

The jury will receive its final instructions from the judge Thursday and is set to begin its deliberations on Monday.

In an unusual twist, the damages phase will begin Monday, even as the jury is deliberating liability. Should the jury return a verdict of no liability before the damage testimony is complete (and assuming Gonzalez Rogers agrees to follow it), there would be no need for a determination of the amount and kind of damages, and presumably the proceedings in that phase would end mid-stride.

Gonzalez Rogers uses a time clock to manage the length of the trial. At the close of pretrial proceedings, she allocated the three parties -- Musk, OpenAI (including Altman, Brockman and affiliates) and Microsoft -- a fixed number of hours for the presentation of their cases.

Court staff keep track of each party's use of time like a chess clock. Gonzalez Rogers has left it to the parties to manage use of their allocated time, but she isn't flexible when it comes to adding time. She said she sees managing the clock as a part of each side's trial strategy.

Most of Wednesday's witnesses were brief and offered to fill in -- or hammer home -- points that the jury had already heard.

Microsoft called its chief technology officer and its head of corporate development to back up Microsoft's central theme that it did a lot of due diligence before investing and its teams found no indication that there were any agreements with Musk about a for-profit subsidiary. Microsoft believed, based on its due diligence, that it was not prohibited from investing in the for-profit.

OpenAI presented three experts to rebut the testimony of Musk's nonprofit governance law expert David Schizer who previously testified that OpenAI and Altman's practices and governance were inconsistent with customs and practices of nonprofit corporations.

OpenAI presented Daniel Hemel, a well-credentialed tax lawyer, to testify about the customs of nonprofits that have for-profit subsidiaries. He said he looked at the 100 largest U.S. charities and determined that 92% had for-profit subsidiaries.

He found that it was not exceptional for a for-profit subsidiary to be larger than its nonprofit parent, citing the family trust that operates a school for underprivileged kids in Pennsylvania while owning the far larger $30 billion Hershey candy company.

He also testified that in most cases he examined, the nonprofits had less control over their for-profit subsidiary than OpenAI holds over its for-profit subsidiary.

The second expert was John Coates, a Harvard Law School professor, who has focused on nonprofit governance. He gave his opinion that Schizer's testimony was repeatedly in error or flatly wrong. He challenged Schizer's opinion that the OpenAI nonprofit was treated unfairly in transactions with its for-profit and with Microsoft.

Coates said in some cases that Schizer offered opinions completely unsupported by a quantitative analysis. In one case, he said he could not understand how Schizer reached his conclusion.

The third expert, forensic accountant Louis Dudney, traced Musk's donations to OpenAI and testified that all the proceeds were used in the pursuit of the nonprofit's mission. His testimony supported OpenAI's argument that all of Musk's donations were used for the purposes intended, and therefore Musk hasn't been wronged.

By far the liveliest testimony came from Joshua Achiam, who today is OpenAI's "chief futurist."

Achiam climbed to the stand and greeted the jury with a bright "Hi!" He is years younger than most of the witnesses who have testified so far. He testified that he earned a Ph.D. in artificial intelligence from the University of California, Berkeley.

He joined OpenAI as an intern in September 2017. He became a full-timer in December that year. In his current role as chief futurist, he works on the safe deployment of advanced AI in the future and how to keep the world safe from the technology.

Achiam attended an all-hands meeting in 2018 when Musk stepped down from the board of OpenAI. He said almost all employees (approximately 50 or 60) were in attendance. The format was that Altman would ask Musk a few questions and then open it up to questions from the employees afterward.

Achiam said Musk told employees at the 2018 meeting that he was leaving the board because Tesla planned to accelerate its AI efforts and he expected to recruit engineers who might otherwise work for OpenAI, creating a conflict.

According to Achiam, Musk also said that he was unhappy with OpenAI's progress in overtaking Google's DeepMind lab in developing AGI (artificial general intelligence) and wanted to go his own way to move faster.

Achiam said among the questions from the employees were several from the safety staff concerned about the implications if Musk initiated a race to develop AGI.

Achiam joined in and said to Musk that a race for AGI was an "unsafe proposition." In his opinion, so much was unknown about AGI, and it would be reckless to create it without first making sure it was safe.

He recalled Musk becoming defensive and calling him a "jackass." Achiam said it wasn't said in a friendly way but was because Musk "was upset that he had been challenged."

In Achiam's telling, the punchline came at the next all-hands meeting when his colleagues presented him with a small trophy with a golden jackass attached to its base. The inscription? "Never stop being a jackass for safety."

Achiam explained that it was given to him for "for standing up to Musk."

After the jackass story, Achiam offered broad supportive testimony for OpenAI as well as the leadership of Altman and Brockman. He said they worked unbelievably hard, that the company was deeply committed to safety, and in his view was irretrievably dedicated to its mission.

The cross-examination of Achiam was short and to the point. Achiam admitted that he had held equity in the company.

When asked what it was worth, he said it was substantial but didn't know exactly because it changed with the valuation of the enterprise.

Alexandra Eynon, one of Musk's lawyers, asked if it was more than $5 million.

Achiam said, "Yes."

"Is it more than 10?" Eynon asked.

"Yes."

While the Jackass trophy provided some humor, the laugh of the day came in the morning before the jury arrived. Steven Molo, Musk's lead lawyer, and Bill Savitt, OpenAI's lawyer, were arguing over whether to correct something Molo had said Tuesday when he was examining Altman.

In the context, Molo got hot and said it was "ironic" that the focus was on what he said, when Altman had clearly been lying.

Gonzalez Rogers cut him off sharply, saying, "This entire trial is a giant irony."

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May 12, 2026, 9:50 PM GMT

'Are you completely trustworthy?': Musk's attorney presses OpenAI CEO in trial

Elon Musk's lawyer began his cross examination of OpenAI CEO Sam Altman in court on Tuesday with a brief question: "Are you completely trustworthy?"

Musk is suing the company and its leaders over allegations that OpenAI, Altman and president Greg Brockman breached their charitable trust when OpenAI shifted from its nonprofit mission to include a profit-oriented structure. Microsoft, an early investor in OpenAI, is named as a co-defendant.

Musk's lawyer grilled Altman about accusations of dishonesty from OpenAI's board members, his investments and his brief, tumultuous ousting as CEO in 2023.

In contrast, OpenAI's attorney suggested Musk, who helped create and fund the company, angled early for total control of OpenAI as Altman pushed back to ensure the powerful tech was not dominated by just one person.

Musk wants the judge to order OpenAI to revert to a nonprofit and for Altman and Brockman to lose their board positions. He's also asking that more than $130 billion go back into OpenAI's nonprofit arm. A ruling in Musk's favor could scramble OpenAI's plans for an initial public offering later this year.

OpenAI has denied Musk's claims, saying Musk wanted a for-profit structure and only brought the case after he failed to gain control of OpenAI. OpenAI has claimed Musk, who started his own AI company after leaving OpenAI in 2018, is now attempting to harm a competitor.

Altman's trustworthiness questioned

Musk attorney Steven Molo cited earlier testimony from OpenAI board members and former executives that Altman was dishonest and created a toxic culture of lying.

Altman called himself "an honest and trustworthy business person" but said he wasn't aware of some specific accusations.

Altman also criticized how the board handled his removal and said there were "misunderstandings."

"I was not trying to deceive the board," he said.

OpenAI board members and executives testified about their qualms with Altman earlier in the trial, including what they described as his resistance to the board's oversight and alleged dishonesty with senior leadership, including former Chief Technology Officer Mira Murati.

OpenAI cofounder Ilya Sutskever, who played a major role in Altman's displacement, testified on Monday that he spent months gathering evidence showing what he said was Altman's pattern of deception and poor management. Sutskever later voted to have Altman return, saying he regretted the decision. Altman returned to his role just days after his removal and a new board was instated.

Altman described the 2023 events as an "incredible betrayal" that was "very public" and "very painful" in Tuesday's testimony.

"If I knew how difficult and painful this was going to be, I never would have tried," Altman said of his decade at OpenAI. "I'm very grateful I didn't, because other than my family, this has been the most meaningful thing in my life I could imagine."

Control over the future of AI

Control over artificial general intelligence, a hypothetical stage of AI in which its cognitive abilities match that of a human across any subject, was an important factor in OpenAI's founding, Altman said. The company was founded in part because Altman and the other cofounders believed one person should not be in charge of AGI if it were achieved, he said.

Musk wanted "total control" of any for-profit OpenAI entity to start, Altman testified, with a promise to reduce that control over time. But Altman wasn't convinced Musk would step back, citing his experience working with startups where leaders rarely give up power over a successful company, he said.

"My belief is he wanted to have long-term control and that he would have had that had we agreed to the structure he wanted," Altman said.

OpenAI's cofounders once asked Musk an important question: If he were to control OpenAI, what would happen to the company on his death? Musk responded that he hadn't thought about it much and that he might pass it on to his children.

Musk's reply was a "hair-raising moment" in the early days of OpenAI, Altman said.

"I didn't feel comfortable with that," Altman said

Musk eventually resigned because he lost confidence in OpenAI and didn't think it would be successful, Altman suggested. At one point, Musk wrote in an email that OpenAI wasn't a "serious counterweight" to Google's DeepMind AI research lab, according to evidence presented in court.

Google was considered the AI leader around the time OpenAI was established. Altman almost didn't even start OpenAI because he thought the search giant was so far ahead, he said.

Before resigning from OpenAI's board in 2018, Musk "demotivated" some key researchers by ranking their accomplishments, Altman testified, which damaged the company culture. Musk's resignation boosted morale, Altman added.

This story has been updated with additional information.

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May 12, 2026, 4:31 PM GMT

Sam Altman takes the stand in trial that could determine OpenAI's future

Sam Altman almost didn't even start OpenAI, now considered a leader in AI, because he thought Google was so far ahead in artificial intelligence that doing so would be hopeless.

That was one of the revelations the OpenAI CEO made on Tuesday when he took the stand in a trial that could determine the future of his company and potentially the AI industry.

Elon Musk, who cofounded and helped fund OpenAI, is suing the company and its leaders over allegations that OpenAI, Altman and president Greg Brockman breached their charitable trust when OpenAI shifted from its nonprofit mission to include a profit-oriented structure. Microsoft, an early investor in OpenAI, is named as a co-defendant.

Musk wants the judge to order OpenAI to revert to a nonprofit and for Altman and Brockman to lose their board positions. He's also asking that more than $130 billion to go back into OpenAI's nonprofit arm. A ruling in Musk's favor could scramble OpenAI's plans for an initial public offering later this year.

OpenAI has denied Musk's claims, saying Musk wanted a for-profit structure and only brought the case after he failed to gain control of OpenAI. OpenAI has claimed Musk, who started his own AI company after leaving OpenAI in 2018, is now attempting to harm a competitor.

Musk's attorneys have tried to paint Altman as deceptive and have brought up his brief ousting in 2023, when the company's board temporarily pushed him out as CEO over concerns about his leadership.

OpenAI board members and executives testified about their qualms with Altman, including his resistance to the board's oversight and alleged dishonesty with senior leadership, including former Chief Technology Officer Mira Murati.

OpenAI cofounder Ilya Sutskever, who played a major role in Altman's removal, testified on Monday that he spent months gathering evidence showing what he said was Altman's pattern of deception and poor management. Sutskever later voted to have Altman return, saying he regretted the decision. Altman returned to his role just days after his removal and a new board was instated.

Altman's own words have also been used as evidence. "I remain enthusiastic about the non profit structure!" he wrote in a 2017 email to Musk during discussions about OpenAI's structure, including the development of a for-profit entity.

When reports surfaced in 2022 indicating Microsoft was considering further investment into OpenAI, already valued at $20 billion at the time, Musk texted Altman that he felt like the situation was "a bait and switch" after saying he "provided almost all the funding."

"I agree this feels bad," Altman responded, adding that OpenAI had offered Musk equity in its capped for-profit entity which Musk declined at the time.

Microsoft's relationship with OpenAI, its motivation for investing in the company and its access to OpenAI's technology and intellectual property were a major focus during CEO Satya Nadella's testimony on Monday.

Altman's testimony is expected to continue into Wednesday, with closing arguments beginning on Thursday before jury deliberations.

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47 minutes ago

Microsoft CEO and OpenAI Co-founder who both helped oust Sam Altman take the stand

Testimony from Microsoft CEO Satya Nadella and OpenAI co-founder Ilya Sutskever highlighted competing narratives Monday in the legal battle between Elon Musk and OpenAI, as jurors heard from key witnesses in federal court.

Testimony from Microsoft CEO Satya Nadella and OpenAI co-founder Ilya Sutskever highlighted competing narratives Monday in the legal battle between Elon Musk and OpenAI, as jurors heard from key witnesses in federal court.

Musk is suing Microsoft for aiding and abetting in a breach of charitable trust, as part of a broader case centered on OpenAI's structure and mission. Nadella took the stand early Monday morning, having been seen pacing in the hallways before his testimony.

"From the OpenAI perspective, the testimony of Mr. Nadella was compelling, candid, straightforward and told the story, which is that Microsoft was a partner," said William Savitt, an attorney for OpenAI.

Nadella described Microsoft's early investment in OpenAI as a significant risk and framed the relationship as a partnership that helped the company grow. He testified that Musk never raised concerns directly with him, saying, "We have each other's phone numbers."

The Microsoft CEO also addressed the brief removal and reinstatement of OpenAI CEO Sam Altman in 2023, a pivotal moment referenced frequently during the trial.

"After Sam Altman was fired and reinstated Nadella, Nadella was in close communication with Mr. Altman and with others at OpenAI, and it was instrumental in his reinstatement and in choosing a new board for the nonprofit," said Marc Toberoff, an attorney for Musk.

Nadella denied demanding Altman's reinstatement, instead characterizing Microsoft's role as an effort to stabilize OpenAI.

He testified that the company sought clarity from the board while also preparing contingency plans to hire Altman and other OpenAI staff if necessary.

Jurors also heard from Ilya Sutskever, OpenAI's co-founder and former chief scientist, who offered insight into the company's early days and internal dynamics.

Sutskever testified that Musk pushed him outside his comfort zone but said there was never a promise that OpenAI would remain a nonprofit organization.

"What you heard him say is that there were never any promises made that could form the charitable trust that Mr. Musk says existed," Savitt said.

Sutskever also addressed his role in Altman's temporary ouster, describing it as an urgent move driven by concerns about leadership.

"I simply care," said Sutskever on the witness stand. "I didn't want it to be destroyed," as he explained his decision and concerns that Altman's behavior was not conducive to maintaining a safe environment for artificial intelligence development.

He testified that he had concerns about Altman's leadership for about a year before the decision and described the situation as a "Hail Mary."

Sutskever's testimony also underscored his long-standing belief in OpenAI's mission. He said he once declined a $6 million annual salary at Google to join OpenAI and estimated his current stake in the company at about $7 billion.

The case has drawn a sharp contrast between Musk's argument, summarized in court as "It's not OK to steal a charity," and Sutskever's one-liner today: "The mission of OpenAI is larger than the structure." With testimony from Nadella and Sutskever complete, jurors are now hearing from Bret Taylor, chairman of the board of directors, as well as chairman of the OpenAI Foundation, which is the non-profit governing the for-profit subsidiary.

Up next: Sam Altman, who is anticipated to take the stand as early as Tuesday.

The trial is progressing toward closing arguments, with jurors expected to begin deliberations by Thursday.