Anthropic Surpasses OpenAI | World’s Most Valuable AI Startup at $965B

Anthropic surpasses OpenAI, and the AI industry is still catching its breath. In a move that few expected to happen this soon, the San Francisco-based AI safety company closed a $65 billion Series H funding round on 28 May 2026, vaulting its post-money valuation to $965 billion and, in a single stroke, dethroning OpenAI as the world’s most valuable artificial intelligence startup.

For anyone tracking the AI arms race, the shift is more than symbolic. Just three months ago, in February 2026, Anthropic was valued at $380 billion, a figure that already seemed eye-watering at the time. Now, the company behind the Claude family of models has nearly tripled that number, leapfrogging OpenAI’s $852 billion valuation set following its own landmark fundraising in March. The gap is striking, and it sends a clear signal: the balance of power in AI is no longer settled.

A Funding Round That Rewrote the Record Books

The sheer scale of the Series H is difficult to overstate. Led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, each of which reportedly put in more than $2 billion, the round also drew participation from a remarkable roster of institutional heavyweights. Capital Group, Coatue, D1 Capital Partners, GIC, Iconiq, Baillie Gifford, Blackstone, Brookfield Asset Management, D.E. Shaw Ventures, DST Global, Fidelity Management & Research, General Catalyst, Insight Partners, Jane Street, Lightspeed, MGX, Situational Awareness LP, Temasek, and XN all joined in.

Strategic infrastructure partners also took part: Samsung, SK Hynix, and Micron, three of the world’s leading memory and storage chip manufacturers, invested in the round, cementing the hardware supply relationships Anthropic will need to sustain its growing computational workload.

Notably, $15 billion of the total came from previously committed investments by hyperscale cloud partners, including a $5 billion commitment from Amazon announced in April. Anthropic has also recently expanded its computing infrastructure through agreements with Amazon, Google, Broadcom, and SpaceX.

This is Anthropic’s third major fundraising event in less than a year. In late 2025, the company raised $13 billion at a $183 billion valuation in its Series F. In February 2026, a $30 billion Series G pushed that figure to $380 billion. The Series H, arriving just three months later, has more than doubled the Series G valuation. By any measure, the pace of Anthropic’s ascent is without precedent in the history of private technology companies.

The Revenue Story That Makes the Valuation Real

Valuations at this altitude can feel disconnected from reality and critics have not been shy about saying so. But Anthropic’s funding announcement came alongside a revenue disclosure that made a compelling case for the numbers.

The company revealed that its annualised revenue crossed $47 billion in May 2026, up sharply from $14 billion reported in February. That is a more than threefold increase in under four months, suggesting that enterprise demand for Claude has been scaling faster than most forecasts anticipated.

By comparison, OpenAI’s annualised revenue is reported to be around $30 billion, a figure Anthropic has now surpassed, adding a second dimension to its claim of leadership. These are no longer just paper valuations driven by investor enthusiasm; they reflect genuine commercial traction at scale.

It is worth noting that OpenAI raised a substantially larger round in March, $122 billion, yet Anthropic’s post-money valuation is now higher. The message Wall Street is reading is that Anthropic’s revenue trajectory and its safety-focused product philosophy are, right now, commanding a greater premium.

What Changed: The Claude Advantage

Anthropic’s rise is inseparable from the story of Claude. Founded in 2021 by siblings Dario Amodei and Daniela Amodei, along with six other former OpenAI researchers, the company has built its identity around one idea: that building powerful AI and building safe AI are not mutually exclusive goals.

That philosophy has resonated strongly with enterprises. Unlike consumer-facing AI tools that prize novelty, large organisations deploying AI in production environments care deeply about reliability, honesty, and predictability. Claude’s reputation on these fronts has become a genuine competitive advantage.

The same day the Series H was announced, Anthropic released Claude Opus 4.8, its latest flagship model. The release arrived just 41 days after its predecessor, Opus 4.7, reflecting an unusually compressed development cycle driven partly by competitive pressure from OpenAI’s GPT-5.5 and Google’s Gemini 3.5 Flash. Opus 4.8 delivers improved performance on coding, reasoning, agentic tasks, and knowledge work. Its pricing remains unchanged from Opus 4.7 — $5 per million input tokens and $25 per million output tokens, though a “Fast Mode” is reportedly three times cheaper than equivalent speeds on previous versions.

Claude Mythos: The Model That Cannot Be Named Publicly Yet

Alongside Opus 4.8, Anthropic is preparing for a broader rollout of Claude Mythos, an advanced AI system built specifically for cybersecurity applications. Mythos is currently available only to a select group of enterprise partners through what Anthropic is calling Project Glasswing, following security concerns that emerged during an initial preview in April 2026.

The capabilities attributed to Mythos are remarkable and, in some respects, sobering: vulnerability discovery, code auditing, exploit-path analysis, defensive infrastructure testing, and autonomous threat investigation. The decision to limit access reflects Anthropic’s stated commitment to proceeding carefully with capabilities that carry significant dual-use risk.

Barron’s has reported that Mythos’ imminent wider release is a factor in investor enthusiasm, with the model expected to expand Anthropic’s footprint in the enterprise cybersecurity market, one of the few sectors where AI has already demonstrated clear, measurable commercial value.

Anthropic’s statement on the matter was measured but confident: “We’re making swift progress on developing these safeguards and expect to be able to bring Mythos-class models to all our customers in the coming weeks.”

The IPO Race Tightens

The Series H may well be Anthropic’s last significant private fundraising before going public. Both Anthropic and OpenAI are widely expected to pursue IPOs in the near term, and the competition to list first and at the more compelling valuation has become a subplot in its own right.

Elon Musk’s SpaceX, which merged with xAI earlier in 2026, is targeting a $2 trillion valuation in a pending IPO and is seeking to raise more than $75 billion. The comparison matters because institutional investors, deciding how to allocate capital across the AI landscape, are watching the relative positions of these companies closely.

Secondary market data adds another layer of colour. Anthropic’s stock is reportedly being traded at around $572 per share in pre-IPO secondary markets, with a target IPO window around October 2026. Meanwhile, prediction market traders are currently pricing a 78% probability that Anthropic will be worth more than Berkshire Hathaway before the end of 2026, a prospect that would have seemed far-fetched even six months ago.

The Broader Implications: Amazon, Google, and the Hyperscaler Bet

Anthropic’s valuation milestone carries significant consequences beyond the AI sector itself. The company’s two largest cloud partners,  Amazon and Google — both hold major stakes and derive substantial infrastructure revenue from Anthropic’s operations. Yahoo Finance analysts have noted that the Series H represents “spectacular news” for both Amazon and Alphabet, whose cloud units stand to benefit directly as Anthropic continues expanding its compute infrastructure.

Amazon’s $5 billion commitment in this round, on top of its previously announced multi-year investment totalling far more, signals that AWS is doubling down on Anthropic as its primary AI partner, a direct counterweight to Microsoft’s deep integration with OpenAI via Azure. The AWS-Anthropic axis and the Azure-OpenAI axis are now clearly the two poles around which the enterprise AI market is organising itself.

Samsung and SK Hynix’s participation in the round is also worth noting. Both South Korean chipmakers are investing not merely for financial return but to secure preferred supplier relationships as Anthropic’s memory and storage requirements grow with each new model generation. Business Korea has described the investments as an entry point into the emerging AI agent ecosystem.

The People Behind the Valuation

Anthropic was built by people who spent years inside OpenAI and chose to leave, not because they were disillusioned with AI, but because they believed the industry was not taking safety seriously enough. Dario Amodei, who served as OpenAI’s Vice President of Research before co-founding Anthropic, has consistently argued that safety and capability are complementary, not competing, priorities.

His sister and co-founder Daniela Amodei, who serves as President, has been widely recognised as one of the most effective operators in Silicon Valley, appearing on Fortune’s coverage of the company this week in the context of its near-trillion-dollar valuation. Their vision for Anthropic was always long-term: build the most capable AI systems in the world, but only as fast as the safety research can keep pace.

That bet, it turns out, has also proved to be an excellent business strategy. Enterprises worried about the reputational and regulatory risks of deploying poorly behaved AI have found in Anthropic a partner that can articulate its safety properties in concrete, auditable terms.

Read More:

SpaceX IPO Filing: The Historic Moment That Could Make Elon Musk a Trillionaire

Meta Lays Off 8000 Employees: AI Restructuring Begins

Confidential Computing + Digital Provenance: How Enterprises Verify AI in the Age of Deepfakes

Not Without Sceptics

Not everyone is convinced the numbers add up. Commentators at Digital Today have pointed out that Anthropic’s forecast first-quarter profitability does not obviously justify a $900 billion-plus valuation when examined against standard financial multiples. Writer Ed Zitron has described Anthropic’s profitability narrative as a “swindle,” arguing that the company is burning cash at a rate that makes true profit a distant prospect.

These are fair challenges to raise. AI companies at this stage of the market are being valued primarily on narrative trajectory and revenue growth rate, rather than on near-term earnings. Whether the revenue momentum, annualised at $47 billion and growing, is durable enough to justify a near-trillion-dollar price tag is a question that only a public market listing will definitively answer.

What is not in dispute is that Anthropic has built something real: products that enterprises are paying for at scale, a safety reputation that genuinely differentiates it from the competition, and a team that has now raised more money, at a higher valuation, than any other private AI company in history.

A New Leaderboard

The world of AI private company valuations, as of late May 2026, looks like this:

• Anthropic — $965 billion (post Series H, May 2026)
• OpenAI — $852 billion (post-funding round, March 2026)
• SpaceX/xAI — targeting $2 trillion at pending IPO

For a company founded just five years ago by a team of eight former OpenAI researchers with a shared conviction that AI safety mattered, reaching this position is a remarkable outcome. It is also, by any historical measure, the fastest ascent of any private technology company to this level of valuation.

The race is far from over. OpenAI is not standing still, Google is not standing still, and Meta has its own ambitions in open-weight AI. But for now, the most valuable AI startup in the world is the one that bet on building trustworthy AI, and proved, in the process, that safety and scale are not opposites.