Nvidia’s massive investment in OpenAI, announced earlier this week, will put billions of dollars into the coffers of the artificial intelligence startup to use as it sees fit. But most of the money will go towards use of Nvidia’s cutting-edge chips.

The agreement between the two companies was big on numbers but thin on specifics. They said the investment would reach up to $100 billion, paid out as AI supercomputing facilities open in the coming years, with the first one coming online in the second half of 2026.

The timing of the buildouts and the cost of each data center remains up in the air. However, what’s become clear is that OpenAI plans to pay for Nvidia’s graphics processing units (GPUs) through lease arrangements, rather than upfront purchases, according to people familiar with the matter who asked not be named because the details are private.

Nvidia CEO Jensen Huang, who described this week’s deal as “monumental in size,” has estimated that an AI data center with a gigawatt of capacity costs roughly $50 billion, with $35 billion of that used to pay for Nvidia’s GPUs. By leasing the processors, OpenAI can spread its costs out over the useful life of the GPUs, which could be up to five years a person said, leaving Nvidia to bear more of the risk.

The Information previously reported on some aspects of the lease arrangement.

Nvidia agreed to invest over time as OpenAI’s data centers get up and running. The initial $10 billion will be available to OpenAI soon, and help the company work towards deploying its first gigawatt of capacity, a source told CNBC.

While Nvidia’s equity investment could help OpenAI with hiring, marketing and operations, the biggest single item it will be used for is compute, the people said. And that’s almost entirely directed at Nvidia’s GPUs, which are key to building and training large language models and for running AI workloads.

As a non-investment-grade startup that lacks positive cash flow, financing remains costly. OpenAI executives have called equity the most expensive way to fund data centers, and said that the company is preparing to take on debt to cover the remainder of the expansion. 

In addition to offering a cost-efficient way for OpenAI to access chips, Nvidia’s lease option and long-term commitment can help the company land better terms from banks when it comes to raising debt, a person said.

An Nvidia spokesperson declined to comment.

Speaking to CNBC in Abilene, Texas, home to the first new data center, OpenAI CFO Sarah Friar pointed to the role Oracle and Nvidia are playing in the financing. Oracle, one of OpenAI’s partners on the Stargate project, is leasing the Abilene facility, and OpenAI will eventually pay for the operations.

“Folks like Oracle are putting their balance sheets to work to create these incredible data centers you see behind us,” Friar said. “In Nvidia’s case, they’re putting together some equity to get it jumpstarted, but importantly, they will get paid for all those chips as those chips get deployed.”

She said all the big partners are needed to help relieve a dramatic shortage of capacity.

“What I think we should all be focused on today is the fact that there’s not enough compute,” Friar said. “As the business grows, we will be more than capable of paying for what is in our future — more compute, more revenue.”

Still, the OpenAI-Nvidia deal has raised some concerns about the sustainability of the AI boom.

Nvidia’s march to a $4.3 trillion market cap has been driven by GPU sales to OpenAI as well as to tech megacaps like Google, Meta, Microsoft and Amazon. OpenAI’s path to a $500 billion private market valuation has been enabled by hefty investments from Microsoft and others that allow the company to burn billions of dollars in cash while building its AI models that power services including ChatGPT.

Jamie Zakalik, an analyst at Neuberger Berman, said the Nvidia deal is the latest example of OpenAI raising money that it pours right back into the company providing the capital.

Investors are concerned about the “circular nature of this deal goosing up everyone’s earnings and everyone’s numbers,” said Zakalik. “But it’s not actually creating anything.”

Asked about those fears, Altman told CNBC the company is focused on driving real demand.

“We need to keep selling services to consumers and businesses — and building these great new products that people pay us a lot of money for,” he said. “As long as that keeps happening, that pays for a lot of these data centers, a lot of chips.”

— CNBC’s Kif Leswing contributed to this report

WATCH: Oracle, OpenAI and SoftBank unveil Stargate data center expansion

Instagram now has 3 billion monthly active users, Meta CEO Mark Zuckerberg said on his Instagram account on Wednesday.

“What an incredible community we’ve built here,” Zuckerberg posted on his Instagram channel.

The figure is a major milestone for the photo-sharing app, which the social media company acquired in 2012 for $1 billion.

Meta last disclosed Instagram’s user figures in October 2022 when Zuckerberg said during an earnings call that the app had crossed 2 billion monthly users.

Meta said in April 2024 that it would no longer disclose the monthly and daily active user numbers for Facebook and its sibling apps on a quarterly basis. Since then, Meta has been reporting each quarter the number of daily active people using its family apps. That figure reached 3.48 billion, the company said in July, topping analysts’ estimates of 3.45 billion.

With 3 billion monthly users, Instagram joins the ranks of the Facebook and WhatsApp platforms.

Zuckerberg in January said that the Facebook app “is used by more than 3 billion monthly actives.” In April, Zuckerberg told analysts that WhatsApp had “more than 3 billion monthly actives.”

WATCH: Meta unveils new AI glasses lineup.

MUNICH — Xiaomi on Wednesday made the international debut of a slew of new devices and appliances with its smartphones at the center, as the Chinese tech giant sets out to directly challenge Samsung.

The Beijing-headquartered company took the wraps off of the Xiaomi 15T series comprising of two smartphones — the Xiaomi 15T and Xiaomi 15T Pro — during a launch event in Munich.

The devices, priced at 649 euros ($766) and 799 euros, respectively, continue Xiaomi’s strategy of bringing phones with the latest specs to the market at a competitive price.

Xiaomi talked up the triple-camera system, large 6.83-inch display and big battery power, as it looks to position the devices as a potential contender to Samsung’s mid-range A series and top-end S Series of smartphones.

For comparison, Samsung’s S25 starts at 799 euros, while its top-end device, the S25 Ultra, starts at 1,249 euros in Germany.

“The 15T is basically an affordable flagship with high-end features but priced half a notch down from the top tier premium devices,” Bryan Ma, vice president of devices research at International Data Corporation, told CNBC by email.

Over the past few years, Xiaomi has expanded its geographical footprint and offerings to include everything from washing machines to electric cars.

In Europe, Xiaomi has cemented itself as the third largest smartphone player by market share, behind Samsung and Apple, through a mix of high-end and mid-tier devices that have offered a stiff challenge to the two giants.

Xiaomi launched its more expensive Xiaomi 15 phones internationally earlier this year. In China, it is gearing up for the unveiling of its 17 series of devices, which will be its flagship.

“Xiaomi 15T is another important step for Xiaomi in its premiumization strategy, particularly trying to capture the slightly more budget-sensitive, spec-focused buyers that still opt for a high-end device, Runar Bjorhovde, analyst at Canalys said.

“One of Xiaomi’s major strategic focuses in taking on the high-end.”

But the company has bigger ambitions. On Wednesday, Xiaomi announced the global launch of it Mijia brand of home appliances, which include a refrigerator, washing machine and air conditioner.

It’s a move right out of Samsung’s playbook. The South Korean technology giant sells products across the world spanning from appliances to smartphones and TVs.

“Xiaomi naturally puts the pressure on any competitor in the sectors that it enters given its operating model of aggressively priced yet good quality products,” Ma said.