Sam Altman, Chief Executive Officer of OpenAI, and Mira Murati, Chief Technology Officer of OpenAI, speak during The Wall Street Journal’s WSJ Tech Live Conference in Laguna Beach, California on October 17, 2023.
Patrick T. Fallon | Afp | Getty Images
Sam Altman’s sudden ouster from OpenAI on Friday shocked Silicon Valley. Not only was Altman, 38, CEO of the hottest startup on the planet, but he had emerged as the face of generative AI after his company’s ChatGPT chatbot went viral late last year.
From the outside, there were some signs of technological challenges at OpenAI, but no indications that tensions were emerging in the boardroom and the C-suite. Altman was still out and about, proselytizing the value of advanced artificial intelligence while also warning of its potential harms and advocating for regulation.
Just last month, reports surfaced that OpenAI was in talks with investors to sell employee shares at an astonishing $86 billion valuation. That’s after tech valuations corrected dramatically over the past 18 months from the decade-long bull market that was fueled by cheap money and a whole lot of FOMO (fear of missing out).
OpenAI was the industry darling in a time of difficulty. Microsoft was pouring in billions of dollars. The company topped CNBC’s Disruptor 50 list, which was published in May. Shortly before the list came out, Altman told CNBC, “I do think we are deep into a new technological wave and this is, I think, the biggest one in a while.”
That all made Altman’s exit hard to fathom and had some in the tech community comparing the move to Apple’s firing of Steve Jobs in 1985. In a statement on its website, OpenAI said, “The board no longer has confidence in his ability to continue leading OpenAI.” The company named Mira Murati, who was the chief technology officer, as interim CEO.
If you followed Altman for the past two weeks, you would’ve seen an industry leader in the center of the action. Here’s an abbreviated timeline of the days leading up to Altman’s departure:
Nov. 6:
Altman took the stage at OpenAI’s DevDay event in San Francisco, where he announced GPT-4 Turbo, the company’s most powerful AI model. Users were also given access to all of OpenAI’s tools, such as its image-generator DALL-E and PDF upload, within ChatGPT.
At the event, Altman said prices for OpenAI’s software would be cut and individual users could customize ChatGPT. He also unveiled an OpenAI app store, an additional way that the company and its investors could monetize its products.
In a surprise appearance, Microsoft CEO Satya Nadella joined Altman on stage to discuss the future of OpenAI and their partnership. Microsoft committed an additional $10 billion earlier this year, the largest AI investment of 2023, according to PitchBook.
“I think we have the best partnership in tech,” Altman told Nadella onstage. “I’m excited for us to build AGI together,” he said, referring to artificial general intelligence.
Nov. 8:
ChatGPT temporarily crashed in the morning. The chatbot told users that “ChatGPT is at capacity right now” and the update page called it a “major outage.” After a little over an hour, the issue was fixed before experiencing difficulties again later in the day.
OpenAI said in the evening that its issues were related to a denial-of-service (DDoS) attack.
“We are dealing with periodic outages due to an abnormal traffic pattern reflective of a DDoS attack,” the company said.
Issues persisted into the next day before being fixed.
Nov. 14:
Altman posted on X, formerly Twitter, that there would be a pause in signing up for ChatGPT Plus. He said there had been a surge in requests after the DevDay announcements and that usage “has exceeded our capacity and we want to make sure everyone has a great experience.”
Nov. 16:
Altman appeared at the Asia-Pacific Economic Cooperation (APEC) summit in San Francisco, speaking on AI.
At 3:28 p.m. ET on Friday, OpenAI published the blog post announcing Altman’s dismissal. At the same time, the company said Greg Brockman, OpenAI’s president, was being stripped of his role as chairman of the board but would stay on as an executive.
Here’s what happened next:
4:46 p.m. ET:
Altman made his first public statement about his departure, writing on X that his experience at the company was “transformative for me personally, and hopefully the world a little bit.”
7:09 p.m. ET:
Brockman announced on X that he’d quit the company “based on today’s news,” and said he was “super proud of what we’ve all built together since starting in my apartment 8 years ago.”
11:42 p.m. ET:
In an X post, Brockman provided a detailed account of Altman’s removal.
He said that on Thursday night, Altman received a text from OpenAI co-founder Ilya Sutskever asking if they could talk the next day at noon. On Friday afternoon, Brockman wrote, Altman joined a Google Meet with OpenAI board members Sutskever, Tasha McCauley, Adam D’Angelo and Helen Toner. Brockman, who was chairman of the board at this time, wasn’t there.
In the meeting, Sutskever told Altman he was out as CEO. Shortly after that, Sutskever informed Brockman he was being removed as chairman but could remain president. OpenAI’s blog post was released at “around the same time,” Brockman wrote.
He said that it appeared Murati only knew of the move the night before. Altman reposted Brockman’s chronicling of the events.
Nov. 18:
Chief Operating Officer Brad Lightcap sent a memo to OpenAI employees addressing the firing. Lightcap said everyone was caught by surprise at the board’s decision and said Murati “has our full support as CEO.”
“We can say definitively that the board’s decision was not made in response to malfeasance or anything related to our financial, business, safety, or security/privacy practices,” Lightcap wrote.
A motorcycle is seen near a building of the Taiwan Semiconductor Manufacturing Company (TSMC), which is a Taiwanese multinational semiconductor contract manufacturing and design company, in Hsinchu, Taiwan, on April 16, 2025.
Here are TSMC’s first-quarter results versus LSEG consensus estimates:
Revenue: $839.25 billion New Taiwan dollars, vs. NT$835.13 billion expected
Net income: NT$361.56 billion, vs. NT$354.14 billion
TSMC’s reported net income increased 60.3% from a year ago to NT$361.56 billion, while net revenue in the March quarter rose 41.6% from a year earlier to NT$839.25 billion.
The world’s largest contract chip manufacturer has benefited from the AI boom as it produces advanced processors for clients such American chip designer Nvidia.
However, the company faces headwinds from the trade policy of U.S. President Donald Trump, who has placed broad trade tariffs on Taiwan and stricter export controls on TSMC clients Nvidia and AMD.
Semiconductor export controls could also be expanded next month under the “AI diffusion rules” first proposed by the Biden administration, further restricting the sales of chipmakers that use TSMC foundries.
Taiwan currently faces a blanket 10% tariff from the Trump administration and that could rise to 32% after the President’s 90-day pause of his “reciprocal tariffs” ends unless it reaches a deal with the U.S.
As part of efforts to diversify its supply chains, TSMC has been investing billions in overseas facilities, though the lion’s share of its manufacturing remains in Taiwan.
In an apparent response to Trump’s trade policy, TSMC last month announced plans to invest an additional $100 billion in the U.S. on top of the $65 billion it has committed to three plants in the U.S.
On Monday, AMD said it would soon manufacture processor chips at one of the new Arizona-based TSMC facilities, marking the first time that its chips will be manufactured in the U.S.
The same day, Nvidia announced that it has already started production of its Blackwell chips at TSMC’s Arizona plants. It plans to produce up to half a trillion dollars of AI infrastructure in the U.S. over the next four years through partners, including TSMC.
Taiwan-listed shares of TSMC were down about 0.4%. Shares have lost about 20% so far this year.
Jensen Huang, co-founder and chief executive officer of Nvidia Corp., during the opening ceremony of the Siliconware Precision Industries Co. (SPIL) Tan Ke Plant in Taichung, Taiwan, on Thursday, Jan. 16, 2025.
An Rong Xu | Bloomberg | Getty Images
A day after Nvidia revealed it would incur $5.5 billion in costs related to canceled orders for the H20 chip, which the government said this week requires a license to export to China, the company said it abides by rules on where it can sell its artificial intelligence processors.
“The U.S. government instructs American businesses on what they can sell and where — we follow the government’s directions to the letter,” an Nvidia representative said in a statement.
Nvidia said the statement was in response to a House Select Committee focused on national security threats from China, which opened an investigation into Nvidia’s sales on Wednesday. The H20 was introduced by Nvidia after the Biden administration restricted AI chip exports in 2022. It’s a slowed-down version intended to comply with U.S. export controls.
Nvidia’s brief comment is an indication of how the company is going to defend its business in Washington, D.C., as its technology draws increased scrutiny related to national defense and security. The company’s stock price tumbled almost 7% on Wednesday.
Nvidia’s chips have the vast majority of the market for AI applications, and some were used by China’s DeepSeek to build R1, which upended markets in January.
On Wednesday, the chipmaker touted the taxes it paid, its U.S.-based workforce, and its role as a technology leader.
The company’s exports even help the U.S. fix its trade deficit, the statement said, directly addressing President Trump’s stated reason for introducing tariffs earlier this month.
“NVIDIA protects and enhances national security by creating U.S. jobs and infrastructure, promoting U.S. technology leadership, bringing billions of dollars of tax revenue to the U.S. treasury, and alleviating the massive U.S. trade deficit,” according to the statement.
One challenge for Nvidia is that the H20 was legal for export to China until last week, under previous Biden administration rules. But the House Select Committee said on Wednesday the sale of H20 chips for the past year was effectively a “loophole.”
“The technology industry supports America when it exports to well-known companies worldwide – if the government felt otherwise, it would instruct us,” Nvidia said in its statement.
The government is also investigating whether shipments of restricted chips to China went through Singapore, Nvidia’s second-largest market by billing address with just under $24 billion in sales in the company’s past fiscal year, according to filings.
Nvidia clarified on Wednesday that its Singapore revenue indicates sales with a billing address in the country, often for subsidiaries of U.S. customers.
“The associated products are shipped to other locations, including the United States and Taiwan, not to China,” Nvidia said.
In addition to Chinese export controls and the congressional investigation, Nvidia also faces additional restrictions on what it can export starting next month, under “AI diffusion rules” first proposed by the Biden administration.
Former Cybersecurity and Infrastructure Security Agency Director Chris Krebs testifies before a Senate Homeland Security and Governmental Affairs hearing to examine claims of voter irregularities in the 2020 election, in the Dirksen Senate Office Building, in Washington, U.S., December 16, 2020.
Jim Lo Scalzo | Reuters
A week ago, President Donald Trump signed an executive order targeting former Cybersecurity and Infrastructure Security Agency Chief Chris Krebs, and calling on the government to suspend the security clearances of any entities with whom he’s associated. The order specifically named SentinelOne, Krebs’ employer.
On Wednesday, Krebs announced his resignation from SentinelOne, a cybersecurity company with a $5.6 billion market cap. While Krebs said the choice was his alone, his swift departure is the latest example of the effect Trump is having on the private sector when it comes to pressuring people and institutions that he personally dislikes.
Krebs had served as SentinelOne’s chief intelligence and public policy officer since late 2023, when the company acquired his consulting firm.
“For those who know me, you know I don’t shy away from tough fights,” Krebs wrote in an email to SentinelOne staffers that the company posted on its website. “But I also know this is one I need to take on fully — outside of SentinelOne. This will require my complete focus and energy. It’s a fight for democracy, for freedom of speech, and for the rule of law. I’m prepared to give it everything I’ve got.”
Krebs served as the first CISA director from 2018 until he was fired in November 2020 after declaring that the presidential election, which Democrat Joe Biden won, was “the most secure in American history.” CISA is part of the Department of Homeland Security.
In his executive order on April 9, which took the extraordinary approach of going after a specific individual, Trump called Krebs a “bad-faith actor who weaponized and abused his Government authority.”
“Krebs’ misconduct involved the censorship of disfavored speech implicating the 2020 election and COVID-19 pandemic,” the order said. “Krebs, through CISA, falsely and baselessly denied that the 2020 election was rigged and stolen, including by inappropriately and categorically dismissing widespread election malfeasance and serious vulnerabilities with voting machines.”
Trump directed the attorney general, director of national intelligence and “all other relevant agencies” to suspend “any active security clearances held by individuals at entities associated with Krebs, including SentinelOne, pending a review of whether such clearances are consistent with the national interest.”
The Wall Street Journal was first to report on Krebs’ departure from SentinelOne, publishing a story on Wednesday based on an interview with Krebs. He told the Journal that he was leaving to push back on Trump’s efforts “to go after corporate interests and corporate relationships.”
The demands on SentinelOne resemble campaigns that President Trump has waged against law firms and universities that he’s tried to strongarm into making significant changes in how they operate or else lose government contracts or funding.
SentinelOne, which uses artificial intelligence to detect threat and prevent cyberattacks, doesn’t disclose how much of its revenue comes from the government. But the company acknowledges in the risk factors section of its financial reports that it relies on government agencies for some of its business and can be hurt by changes in policy.
“Our future growth depends, in part, on increasing sales to government organizations,” the latest quarterly filing says. Specific to Trump, SentinelOne said that the establishment of the Department of Government Efficiency, which Elon Musk is running, could lead to budgetary changes that “adversely affect the funding for and purchases of our platform by government organizations.”
SentinelOne CEO Tomer Weingarten told employees in a memo, also posted to the company’s site on Wednesday, that Krebs “helped shape important conversations and strengthened public-private collaboration.” The company previously said, in a blog post after the executive order, that fewer than 10 employees had security clearances.
“Accordingly, we do not expect this to materially impact our business in any way,” the post said.