Anthropic, the San Francisco artificial intelligence company behind the Claude chatbot, announced on Thursday May 28, 2026 that it has raised $65 billion in a Series H funding round at a post-money valuation of $965 billion. The announcement makes Anthropic the most valuable AI startup in the world, officially overtaking rival OpenAI for the first time in the companies’ four-year competition for dominance in the AI industry.
OpenAI was last valued at $852 billion after closing a $122 billion fundraising round in March 2026. Anthropic’s new valuation nearly doubles that figure. Three months ago, in February 2026, Anthropic was valued at $380 billion. The jump to $965 billion in a single round is among the fastest valuation leaps in the history of private technology companies.
The announcement came the same day Anthropic launched Claude Opus 4.8, its newest and most capable model yet.
Who Led the Round and Who Invested
The Series H round was co-led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, alongside Capital Group, Coatue, D1 Capital Partners, GIC, ICONIQ, and XN.
Significant institutional investors in the round include Baillie Gifford, Blackstone, Brookfield, D.E. Shaw Ventures, DST Global, Fidelity Management and Research Company, General Catalyst, Insight Partners, Jane Street, Lightspeed Venture Partners, MGX, NTTVC, NX1 Capital, T. Rowe Price Associates, and Temasek.
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The round also includes $15 billion of previously committed investments from hyperscalers, including a $5 billion commitment from Amazon that was announced in April 2026. Amazon had previously invested $4 billion in Anthropic in 2023, making it one of the company’s earliest and largest strategic backers.
Strategic infrastructure partners Samsung, SK Hynix, and Micron also joined the round, reflecting the compute-intensive nature of AI model training and the growing importance of memory chip suppliers to the AI industry’s infrastructure stack.
One institutional investor, according to TechCrunch reporting, had pledged as much as $5 billion just to get a meeting with Anthropic CFO Krishna Rao, illustrating the level of investor demand surrounding the round.
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The Revenue Number That Changed Everything
The valuation leap is not purely speculative. Anthropic’s revenue has exploded thanks to its popular AI coding assistant Claude Code, with the company reporting a $47 billion revenue run rate on Thursday. That is up from a $30 billion run rate earlier this year and $10 billion in revenue last year.
In Anthropic’s own announcement, the company stated: “Since our Series G in February, adoption has continued to grow across global enterprise customers, and our run-rate revenue crossed $47 billion earlier this month.”
CFO Krishna Rao added: “Claude is increasingly indispensable to our growing global community of customers, and we work tirelessly to make tools like Claude Code and Cowork more helpful, more powerful, and more adaptable to their needs.”
The revenue trajectory is striking. Going from $10 billion annually in 2025 to a $47 billion run rate by May 2026 represents a near fivefold increase in twelve months. The primary driver is enterprise adoption of Claude for coding, with Claude Code, Anthropic’s command-line coding tool, emerging as the product that has most meaningfully separated Anthropic from the field.
How Anthropic Got Here: A Valuation Timeline
To understand how significant the $965 billion figure is, it helps to see where Anthropic has been.
| Date | Valuation | Amount Raised |
|---|---|---|
| September 2024 | $183 billion | $13 billion (Series F) |
| January 2026 | $350 billion | $10 billion (Series G target) |
| February 2026 | $380 billion | $30 billion (Series G close) |
| May 28, 2026 | $965 billion | $65 billion (Series H) |
The jump from $380 billion to $965 billion in roughly three months reflects both the revenue acceleration and the broader market’s conviction that Anthropic is positioned to be one of the defining companies of the AI era.
For comparison, OpenAI was valued at $852 billion in March 2026 following a $122 billion round. The new valuation after the Series H funding round puts Anthropic ahead of rival OpenAI, which was last valued at $852 billion post-money in March. It is the first time in the two companies’ histories that Anthropic has held a higher private market valuation than OpenAI.
What the Money Will Be Used For
Anthropic has been explicit about where the $65 billion is going.
The latest funding is expected to advance safety and interpretability research, expand compute to meet growing demand for Claude, and scale the products and partnerships customers rely on.
Compute expansion is the most immediately pressing need. Claude’s usage has grown faster than Anthropic’s ability to provision the GPU and memory capacity needed to serve it. The inclusion of Samsung, SK Hynix, and Micron as strategic infrastructure partners is directly tied to this: memory chips are a critical bottleneck in running large-scale AI inference, and locking in relationships with the world’s leading memory manufacturers is a strategic move as much as a financial one.
Safety and interpretability research is the other stated priority. Anthropic was founded explicitly around the premise that building safe AI is a prerequisite for building beneficial AI. The interpretability research program, which attempts to understand what is happening inside AI models at a mechanistic level, is one of the most ambitious scientific programs in the company and one that requires sustained long-term investment.
Claude Opus 4.8 Launches the Same Day
The timing of the funding announcement alongside the launch of Claude Opus 4.8 is not coincidental. Anthropic released its newest flagship model on the same day as the Series H announcement, showcasing continued technical progress as context for the valuation.
The round comes the same day that Anthropic released its new Claude Opus 4.8 model, which touts better capabilities in agentic tasks, advanced coding, and focus on honesty and self-correction.
The agentic task improvements in Opus 4.8 are particularly significant given where the AI industry is headed in 2026. As covered in BrieflyUSA’s breakdown of agentic AI, the shift from AI that answers questions to AI that completes tasks autonomously is the defining technological transition of this moment. Anthropic’s continued investment in agentic capabilities positions Claude directly in the center of that transition.
Anthropic vs OpenAI: Where the Two Companies Stand
The funding announcement explicitly frames the comparison. The announcement vaults Anthropic ahead of its chief rival, ChatGPT maker OpenAI, both in market value and in reported revenue.
The revenue comparison is the more surprising of the two. OpenAI has been widely reported as the revenue leader in the AI industry, with estimates of its annual revenue in the $10 to $15 billion range as of early 2026. Anthropic’s $47 billion run rate, if accurate, would represent a significant reversal of that dynamic.
The primary explanation is enterprise penetration. While OpenAI’s consumer products including ChatGPT have enormous user bases, Anthropic’s strategy has been more focused on enterprise customers and API access. Claude Code in particular has driven deep adoption inside software development organizations where the per-user revenue is significantly higher than consumer subscriptions.
The two companies are also on parallel paths toward public markets. Anthropic’s pursuit of private funding coincides with preparations for a public listing, according to investors and bankers familiar with the company. Both Anthropic and OpenAI are planning to tap the public market, possibly as quickly as this year, to acquire the computational resources necessary to power their services and train new models.
SpaceX, for comparison, was valued at $800 billion last year before growing to $1.25 trillion after merging with Elon Musk’s xAI in February 2026. Anthropic at $965 billion is approaching that territory while still private.
What This Means for the AI Industry
The Anthropic Series H is not just a company milestone. It is a data point about where the AI industry is in May 2026.
Three years ago, raising $1 billion was considered a landmark event for an AI startup. Two years ago, $10 billion rounds were the outlier. Today, a single funding round of $65 billion at a near-trillion dollar valuation is announced and processed as significant but not shocking news.
The scale reflects the genuine belief among institutional investors, sovereign wealth funds, and strategic technology companies that the AI industry is building something with the economic significance of the internet era, compressed into a much shorter timeline.
For Anthropic specifically, the valuation acknowledges that Claude has moved from being a well-regarded ChatGPT alternative into something that enterprises are treating as critical infrastructure. When companies describe a tool as indispensable, as Anthropic’s CFO did on Thursday, that is the language of infrastructure, not features.
The competition between Anthropic and OpenAI is not over. OpenAI has a larger consumer user base, a deeper relationship with Microsoft’s enterprise ecosystem, and its own aggressive product roadmap. But for the first time, Anthropic has the higher number next to its name. In the AI industry’s ongoing race, that matters.
The IPO Question
The Series H round marks what could be the AI startup’s final private fundraise before debuting on the public markets.
An Anthropic IPO would be one of the most significant public offerings in technology history. At $965 billion, an IPO would value the company in the same range as Apple, Microsoft, and Nvidia, the three largest public companies in the world by market capitalization as of mid-2026.
Whether Anthropic goes public in 2026 or waits until 2027 depends on market conditions, regulatory clarity around AI companies, and whether the company believes its revenue trajectory justifies the scrutiny that comes with public reporting requirements. What Thursday’s announcement makes clear is that the groundwork is being laid.
The Bottom Line
Anthropic raised $65 billion at a $965 billion valuation on May 28, 2026, officially surpassing OpenAI in private market value for the first time. The round was led by Altimeter, Dragoneer, Greenoaks, and Sequoia, with participation from Amazon, Samsung, SK Hynix, Micron, and dozens of institutional investors.
The company reported a $47 billion revenue run rate, up from $10 billion a year ago, driven primarily by enterprise adoption of Claude Code. The same day, it launched Claude Opus 4.8 with improved agentic and coding capabilities.
The money goes toward compute expansion, safety research, and scaling Claude’s product ecosystem. An IPO is expected to follow, potentially before the end of 2026.
For the AI industry, the headline tells the story: Anthropic is now the most valuable AI startup in the world.
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