Nvidia, Microsoft back Anthropic in a $45 billion bid for AI scale

Three tech giants just tightened the AI race by tightening their grip on each other. Nvidia, Microsoft, and Anthropic announced Tuesday that they’ve formed a three-way partnership that ties together Nvidia’s next-gen chips and systems, Azure’s data-center infrastructure, and Anthropic’s Claude models, creating a loop that locks billions in spending — and influence — across all three.

Anthropic has committed roughly $30 billion to purchase compute on Azure’s platform, a number large enough to secure 1 gigawatt in capacity. Meanwhile, Nvidia pledged up to $10 billion and Microsoft up to $5 billion in direct investment in Anthropic. Microsoft said Claude will be trained and deployed on Azure using Nvidia accelerators. And those commitments sit alongside a deeper technical alignment: Nvidia and Anthropic will collaborate on design and engineering, forming a “deep technology partnership.”

All in all, that means that Nvidia gets deeper visibility into how frontier systems are built, Microsoft gets Claude as a second flagship model and can wean itself off of its OpenAI partnership, and Anthropic gets the industrial-scale infrastructure it needs to keep growing.

“We are increasingly going to be customers of each other,” Microsoft CEO Satya Nadella said to open up a video with the three company CEOs. “We will use Anthropic models, they will use our infrastructure, and we will go to market together to help our customers realize the value of AI.” Added Anthropic CEO Dario Amodei, “We’re very excited to get additional capacity that we can use both to train our models … and to sell together.”

Investors took a more cautious view. Shares of Microsoft and Nvidia both slipped on the news — down around 3% and 2% midday, respectively — reflecting Wall Street’s broader stretch of skepticism toward big AI bets, as investors question whether the current wave of infrastructure spending is running ahead of near-term returns.

Tuesday’s deal arrives during an aggressive infrastructure expansion — and in a market that has been trying to understand how long the AI buildout can run at full tilt. Demand for high-end GPUs continues to outrun supply; Microsoft is adding data-center capacity at a speed normally associated with national infrastructure projects; and Anthropic has been scaling Claude quickly enough to secure multiyear cloud commitments from more than one hyperscaler.

A three-way deal of this size gives each of them a clearer runway — and sends a message to rivals about who plans to dominate the next training cycle.

The partnership slots into an increasingly aggressive wave of AI alliances and the broader realignment happening across the model ecosystem. OpenAI moved a large share of its cloud pipeline to Amazon earlier this month through a $38 billion multiyear agreement with AWS. Google continues to push its Gemini ecosystem across its consumer and enterprise products. Meta is still pursuing its open-source strategy with Llama. These moves have pushed competition toward a new phase, where model labs, chipmakers, and hyperscalers are locking themselves together through long-term contracts rather than short-cycle infrastructure buys.

Nadella said on the CEO video that the partnership works only if the companies stop treating capacity as something to guard, not share, saying that the industry needs to “move beyond any type of zero-sum narrative or winner-take-all hype.” But the money moving through AI right now still rewards scale over cooperation, and the biggest players keep structuring deals to secure their own lanes first.

Anthropic enters the arrangement with the most to gain. The company already has multimodal deals with Amazon and Google; now, it has a third hyperscaler with direct ownership ties. Claude’s trajectory has been steep — a year ago, the startup was jockeying for cloud capacity — but sustaining that momentum requires access to massive, predictable compute — and the capital to secure it. The Azure commitment does both. It gives Anthropic the ability to train larger and more frequent model iterations, it strengthens its enterprise pitch, and it aligns its roadmap with two of the most powerful players in the industry.

Nvidia CEO Jensen Huang called the collaboration “a dream come true,” praised Anthropic’s “seminal” work in AI safety, and said Nvidia’s engineers “love Claude code.” He cast the relationship as a chance to push Anthropic’s workloads through Blackwell and then Vera Rubin, with the intent to deliver an order-of-magnitude performance gain that could reframe cost and speed for frontier models.

“The world is just barely realizing where we are in the AI journey,” he said. “The thing that’s really great is they’re going to need a lot more Azure Compute resources, and they’re going to need a lot more GPUs, and we’re just delighted to partner with you, Dario, to bring AI to the world.”

Right now, Nvidia’s chips sit at the center of nearly every frontier model, Azure’s capacity is expanding at a ridiculous pace, and Claude’s rise has given Anthropic the leverage to secure long-term backing from both sides. The partnership effectively builds a protected lane for all three — one that keeps competitors guessing and capital flowing.

The agreement places the three companies at the center of the AI race. Each brings a different piece of the stack, and each now has multiyear commitments tying its AI roadmap to the other two. As rivals deepen their own alliances, the Microsoft–Nvidia–Anthropic bloc shows how far the industry is willing to go to secure the infrastructure behind the next generation of AI.