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OpenAI has closed its long-awaited funding round at a valuation of $157 billion, including the $6.6 billion the company raised from an extensive roster of investment firms and big tech companies.

While OpenAI didn’t name the investors in Wednesday’s press release, a person with knowledge of the matter said the round was led by Thrive Capital and included participation from existing backer Microsoft as well as chipmaker Nvidia, SoftBank and others. Thrive planned to invest $1 billion in the round, CNBC previously reported.

OpenAI’s rapid ascent, which began with the launch of ChatGPT in late 2022, has been the biggest story in the tech industry over the last couple years, bringing the concept of generative artificial intelligence into the mainstream and paving the way for tens of billions of dollars of investments in AI infrastructure.

“The new funding will allow us to double down on our leadership in frontier AI research, increase compute capacity, and continue building tools that help people solve hard problems,” OpenAI wrote in a blog post Wednesday.

OpenAI generated $300 million in revenue last month, up 1,700% since the beginning of last year, CNBC confirmed last week, following reporting by The New York Times. The company expects to bring in $11.6 billion in sales next year, up from $3.7 billion in 2024, according to a person close to OpenAI who asked not to be named because the financials are confidential.

But all that revenue is extremely costly, as OpenAI has to ramp up purchases of Nvidia’s graphics processing units (GPUs) to train and run its large language models. The company expects to lose about $5 billion this year, the person said. Microsoft has invested billions of dollars in OpenAI and is a key partner as the software giant bolsters its Azure cloud business.

Earlier this year, OpenAI was valued at a reported $80 billion, up from $29 billion in 2023. Following the viral growth of ChatGPT, momentum has continued with new products for businesses and an expansion into AI-generated photos and videos.

OpenAI now has 250 million weekly active users on ChatGPT, CFO Sarah Friar told CNBC in a statement. There are also 11 million ChatGPT Plus subscribers and 1 million paying business users on ChatGPT, a person close to the company said.

“AI is already personalizing learning, accelerating healthcare breakthroughs, and driving productivity,” Friar said in the statement. “And this is just the start.”

OpenAI is experiencing plenty of growing pains along the way, including the loss of key executives, a trend that continued through last week.

Last Wednesday, OpenAI Chief Technology Officer Mira Murati, who briefly served as interim CEO, said she would be leaving after 6½ years. Shortly after that, research chief Bob McGrew and Barret Zoph, a research vice president, said they were leaving the company.

In an interview the next day at Italian Tech Week, OpenAI CEO Sam Altman said, “I think this will be hopefully a great transition for everyone involved and I hope OpenAI will be stronger for it, as we are for all of our transitions.”

Also on Thursday, OpenAI held an all-hands meeting, following the board’s decision to consider restructuring the company to a for-profit business, according to a separate person with knowledge of the matter. Altman said the departures were not related to the potential restructuring, contrary to some media reports.

Should the change occur, the nonprofit segment would remain as a separate entity, the source said.

At Thursday’s meeting, Altman denied reports of plans for him to receive a “giant equity stake” in the company, calling that information “just not true,” according to a person who was in attendance.

OpenAI Chairman Bret Taylor told CNBC in a statement last week that while the board has talked about the matter, no specific figures are on the table.

“The board has had discussions about whether it would be beneficial to the company and our mission to have Sam be compensated with equity, but no specific figures have been discussed nor have any decisions been made,” Taylor said.

The latest funding round also included participation from Khosla Ventures, Altimeter Capital, Fidelity, MGX and Tiger Global, sources told CNBC.

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Amazon Web Services is building equipment to cool Nvidia GPUs as AI boom accelerates

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Amazon Web Services is building equipment to cool Nvidia GPUs as AI boom accelerates

The letters AI, which stands for “artificial intelligence,” stand at the Amazon Web Services booth at the Hannover Messe industrial trade fair in Hannover, Germany, on March 31, 2025.

Julian Stratenschulte | Picture Alliance | Getty Images

Amazon said Wednesday that its cloud division has developed hardware to cool down next-generation Nvidia graphics processing units that are used for artificial intelligence workloads.

Nvidia’s GPUs, which have powered the generative AI boom, require massive amounts of energy. That means companies using the processors need additional equipment to cool them down.

Amazon considered erecting data centers that could accommodate widespread liquid cooling to make the most of these power-hungry Nvidia GPUs. But that process would have taken too long, and commercially available equipment wouldn’t have worked, Dave Brown, vice president of compute and machine learning services at Amazon Web Services, said in a video posted to YouTube.

“They would take up too much data center floor space or increase water usage substantially,” Brown said. “And while some of these solutions could work for lower volumes at other providers, they simply wouldn’t be enough liquid-cooling capacity to support our scale.”

Rather, Amazon engineers conceived of the In-Row Heat Exchanger, or IRHX, that can be plugged into existing and new data centers. More traditional air cooling was sufficient for previous generations of Nvidia chips.

Customers can now access the AWS service as computing instances that go by the name P6e, Brown wrote in a blog post. The new systems accompany Nvidia’s design for dense computing power. Nvidia’s GB200 NVL72 packs a single rack with 72 Nvidia Blackwell GPUs that are wired together to train and run large AI models.

Computing clusters based on Nvidia’s GB200 NVL72 have previously been available through Microsoft or CoreWeave. AWS is the world’s largest supplier of cloud infrastructure.

Amazon has rolled out its own infrastructure hardware in the past. The company has custom chips for general-purpose computing and for AI, and designed its own storage servers and networking routers. In running homegrown hardware, Amazon depends less on third-party suppliers, which can benefit the company’s bottom line. In the first quarter, AWS delivered the widest operating margin since at least 2014, and the unit is responsible for most of Amazon’s net income.

Microsoft, the second largest cloud provider, has followed Amazon’s lead and made strides in chip development. In 2023, the company designed its own systems called Sidekicks to cool the Maia AI chips it developed.

WATCH: AWS announces latest CPU chip, will deliver record networking speed

AWS announces latest CPU chip, will deliver record networking speed

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Bitcoin rises to fresh record above $112,000, helped by Nvidia-led tech rally

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Bitcoin rises to fresh record above 2,000, helped by Nvidia-led tech rally

The logo of the cryptocurrency Bitcoin can be seen on a coin in front of a Bitcoin chart.

Silas Stein | Picture Alliance | Getty Images

Bitcoin hit a fresh record on Wednesday afternoon as an Nvidia-led rally in equities helped push the price of the cryptocurrency higher into the stock market close.

The price of bitcoin was last up 1.9%, trading at $110,947.49, according to Coin Metrics. Just before 4:00 p.m. ET, it hit a high of $112,052.24, surpassing its May 22 record of $111,999.

The flagship cryptocurrency has been trading in a tight range for several weeks despite billions of dollars flowing into bitcoin exchange traded funds. Bitcoin purchases by public companies outpaced ETF inflows in the second quarter. Still, bitcoin is up just 2% in the past month.

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Bitcoin climbs above $112,000

On Wednesday, tech stocks rallied as Nvidia became the first company to briefly touch $4 trillion in market capitalization. In the same session, investors appeared to shrug off the latest tariff developments from President Donald Trump. The tech-heavy Nasdaq Composite notched a record close.

While institutions broadly have embraced bitcoin’s “digital gold” narrative, it is still a risk asset that rises and falls alongside stocks depending on what’s driving investor sentiment. When the market is in risk-on mode and investors buy growth-oriented assets like tech stocks, bitcoin and crypto tend to rally with them.

Investors have been expecting bitcoin to reach new records in the second half of the year as corporate treasuries accelerate their bitcoin buying sprees and Congress gets closer to passing crypto legislation.

Don’t miss these cryptocurrency insights from CNBC Pro:

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Perplexity launches AI-powered web browser for select group of subscribers

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Perplexity launches AI-powered web browser for select group of subscribers

Dado Ruvic | Reuters

Perplexity AI on Wednesday launched a new artificial intelligence-powered web browser called Comet in the startup’s latest effort to compete in the consumer internet market against companies like Google and Microsoft.

Comet will allow users to connect with enterprise applications like Slack and ask complex questions via voice and text, according to a brief demo video Perplexity released on Wednesday.

The browser is available to Perplexity Max subscribers, and the company said invite-only access will roll out to a waitlist over the summer. Perplexity Max costs users $200 per month.

“We built Comet to let the internet do what it has been begging to do: to amplify our intelligence,” Perplexity wrote in a blog post on Wednesday.

Perplexity is best known for its AI-powered search engine that gives users simple answers to questions and links out to the original source material on the web. After the company was accused of plagiarizing content from media outlets, it launched a revenue-sharing model with publishers last year.

In May, Perplexity was in late-stage talks to raise $500 million at a $14 billion valuation, a source familiar confirmed to CNBC. The startup was also approached by Meta earlier this year about a potential acquisition, but the companies did not finalize a deal.

“We will continue to launch new features and functionality for Comet, improve experiences based on your feedback, and focus relentlessly–as we always have–on building accurate and trustworthy AI that fuels human curiosity,” Perplexity said Wednesday.

WATCH: Perplexity CEO on AI race: The market of providing answers to questions will become a commodity

Perplexity CEO on AI race: The market of providing answers to questions will become a commodity

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