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Microsoft CEO Satya Nadella speaks during the OpenAI DevDay event on November 06, 2023 in San Francisco, California. OpenAI CEO Sam Altman delivered the keynote address at the first ever Open AI DevDay conference.

Justin Sullivan | Getty Images

Microsoft has invested billions of dollars in OpenAI. But for a brief time on Thursday, employees of the software company weren’t allowed to use the startup’s most famous product, ChatGPT, CNBC has learned.

“Due to security and data concerns a number of AI tools are no longer available for employees to use,” Microsoft said in an update on an internal website. CNBC also viewed a screenshot that showed that ChatGPT couldn’t be accessed on corporate devices.

Microsoft and OpenAI representatives didn’t immediately respond to requests for comment.

“While it is true that Microsoft has invested in OpenAI, and that ChatGPT has built-in safeguards to prevent improper use, the website is nevertheless a third-party external service,” Microsoft said. “That means you must exercise caution using it due to risks of privacy and security. This goes for any other external AI services, such as Midjourney or Replika, as well.”

The company initially said it was banning ChatGPT and design software Canva, but later removed a line in the advisory that included those products. After initial publication of this story, Microsoft reinstated access to ChatGPT.

Many large companies have restricted use of ChatGPT, often to prevent the sharing of confidential data. Having been trained on extensive internet data, ChatGPT composes human-like responses to people’s chat messages. The service has over 100 million users.

Microsoft’s update recommends people use the company’s own Bing Chat tool, which relies on OpenAI artificial intelligence models. The two companies are closely tied. Microsoft has also been busy this year bringing out updates to its Windows operating system and Office applications that take advantage of OpenAI services, which in turn run on Microsoft’s Azure cloud infrastructure.

Earlier this week, CEO Satya Nadella appeared onstage alongside OpenAI’s Sam Altman at the startup’s first developer conference.

Following publication of this article, Altman wrote in a post on X, “the rumors that we are blocking microsoft 365 in retaliation are completely unfounded.”

In January a high-ranking Microsoft engineer wrote in a forum that employees could use ChatGPT but advised against entering confidential information, Insider reported.

WATCH: OpenAI on pace for $1.3 billion in 2023 revenue, up 4543% from last year

OpenAI on pace for $1.3 billion in 2023 revenue, up 4543% from last year

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OpenAI announces new mentorship program for budding tech founders

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OpenAI announces new mentorship program for budding tech founders

Dado Ruvic | Reuters

OpenAI on Friday introduced a new program, dubbed the “OpenAI Grove,” for early tech entrepreneurs looking to build with artificial intelligence, and applications are already open.

Unlike OpenAI’s Pioneer Program, which launched in April, Grove is aimed towards individuals at the very nascent phases of their company development, from the pre-idea to pre-seed stage.

For five weeks, participants will receive mentoring from OpenAI technical leaders, early access to new tools and models, and in-person workshops, located in the company’s San Francisco headquarters.

Roughly 15 members will join Grove’s first cohort, which will run from Oct. 20 to Nov. 21, 2025. Applicants will have until Sept. 24 to submit an entry form.

CNBC has reached out to OpenAI for comment on the program.

Following the program, Grove participants will be able to continue working internally with the ChatGPT maker, which was recent valued $500 billion.

Other industry rivals have also already launched their own AI accelerator programs, including the Google for Startups Cloud AI Accelerator last winter. Earlier this April, Microsoft for Startups partnered with PearlX, a cohort accelerator program for pre-seed companies.

Nurturing these budding AI companies is just a small chip in the recent massive investments into AI firms, which ate up an impressive 71% of U.S. venture funding in 2025, up from 45% last year, according to an analysis from J.P. Morgan.

AI startups raised $104.3 billion in the U.S. in the first half of this year, and currently over 1,300 AI startups have valuations of over $100 million, according to CB Insights.

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Benioff says he’s ‘inspired’ by Palantir, but takes another jab at its prices

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Benioff says he's 'inspired' by Palantir, but takes another jab at its prices

Salesforce CEO Marc Benioff on what the market is getting wrong about AI

Marc Benioff is keeping an eye on Palantir.

The co-founder and CEO of sales and customer service management software company Salesforce is well aware that investors are betting big on Palantir, which offers data management software to businesses and government agencies.

“Oh my gosh. I am so inspired by that company,” Benioff told CNBC’s Morgan Brennan in a Tuesday interview at Goldman Sachs‘ Communacopia+Technology conference in San Francisco. “I mean, not just because they have 100 times, you know, multiple on their revenue, which I would love to have that too. Maybe it’ll have 1000 times on their revenue soon.”

Salesforce, a component of the Dow Jones Industrial Average, remains 10 times larger than Palantir by revenue, with over $10 billion in revenue during the latest quarter. But Palantir is growing 48%, compared with 10% for Salesforce.

Benioff added that Palantir’s prices are “the most expensive enterprise software I’ve ever seen.”

“Maybe I’m not charging enough,” he said.

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It wasn’t Benioff’s first time talking about Palantir. Last week, Benioff referenced Palantir’s “extraordinary” prices in an interview with CNBC’s Jim Cramer, saying Salesforce offers a “very competitive product at a much lower cost.”

The next day, TBPN podcast hosts John Coogan and Jordi Hays asked for a response from Alex Karp, Palantir’s co-founder and CEO.

“We are very focused on value creation, and we ask to be modestly compensated for that value,” Karp said.

The companies sometimes compete for government deals, and Benioff touted a recent win over Palantir for a U.S. Army contract.

Palantir started in 2003, four years after Salesforce. But while Salesforce went public in 2004, Palantir arrived on the New York Stock Exchange in 2020.

Palantir’s market capitalization stands at $406 billion, while Salesforce is worth $231 billion. And as one of the most frequently traded stocks on Robinhood, Palantir is popular with retail investors.

Salesforce shares are down 27% this year, the worst performance in large-cap tech.

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Salesforce and Palantir year to date stock chart.

We're seeing an incredible transformation in enterprise, says Salesforce CEO Marc Benioff

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Gemini, the Winklevoss’ crypto exchange, pops more than 40% in Nasdaq debut

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Gemini, the Winklevoss' crypto exchange, pops more than 40% in Nasdaq debut

Gemini Co-founders Tyler Winklevoss and Cameron Winklevoss attend the company’s IPO at the Nasdaq MarketSite in New York City, U.S., Sept. 12, 2025.

Jeenah Moon | Reuters

Shares of Gemini Space Station soared more than 40% on Thursday after the exchange operator raised $425 million in an initial public offering.

The stock opened at $37.01 on the Nasdaq after its IPO priced at $28. At one point, shares traded as high as $40.71.

The New York-based company priced its IPO late Thursday above this week’s expected range of $24 to $26, and an initial range of between $17 and $19. That valued the company at some $3.3 billion before trading began.

Gemini, which primarily operates as a cryptocurrency exchange, was founded by the Winklevoss brothers in 2014 and held more than $21 billion of assets on its platform as of the end of July. Per its registration with the Securities and Exchange Commission, Gemini posted a net loss of $159 million in 2024, and in the first half of this year, it lost $283 million.

The company also offers a U.S. dollar-backed stablecoin, credit cards with a crypto-back rewards program and a custody service for institutions.

Gemini co-founders Tyler & Cameron Winklevoss: Bitcoin is gold 2.0, can easily go 10x from here

The Winklevoss brothers were among the earliest bitcoin investors and first bitcoin billionaires. They have long held that bitcoin is a superior store of value than gold. On Friday morning, they told CNBC’s “Squawk Box” they see its price reaching $1 million a decade from now.

In 2013, they were the first to apply to launch a bitcoin exchange-traded fund, more than 10 years before the first bitcoin ETFs would eventually be approved. The Securities and Exchange Commission’s rejection of the application, which cited risk of fraud and market manipulation, set the stage for the bitcoin ETF debate in the years to come.

Even in the early days, when bitcoin was notorious for its extreme volatility and anti-establishment roots and shunned by Wall Street, the Winklevoss brothers were outspoken about the need for smart regulation that would establish rules for the crypto-led financial revolution.

Don’t miss these cryptocurrency insights from CNBC Pro:

(Learn the best 2026 strategies from inside the NYSE with Josh Brown and others at CNBC PRO Live. Tickets and info here.)

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