Anthropic Just Passed OpenAI: $965 Billion Valuation, Opus 4.8, and the IPO Race

On May 28, 2026, Anthropic logged two milestones in a single day. It released Claude Opus 4.8, its latest flagship model, and it announced a $65 billion Series H funding round at a $965 billion post-money valuation — officially surpassing OpenAI's $852 billion to become the most valuable AI company in the world. The round was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, with co-leads including Capital Group, Coatue, D1 Capital Partners, GIC, ICONIQ, and XN, plus $15 billion in previously committed hyperscaler investments including $5 billion from Amazon.

The trajectory is staggering. In February 2026, Anthropic was valued at $380 billion. Three and a half months later, that number has more than doubled to $965 billion — nearly a trillion dollars. The company's annualized revenue run rate hit $47 billion, up from $30 billion just weeks earlier and roughly five times last year's pace. Anthropic is now firmly ahead of OpenAI as both companies race toward IPOs expected later this year.

How Anthropic Surpassed OpenAI

The valuation milestone reflects revenue growth that's genuinely difficult to find historical parallels for. Anthropic's run-rate revenue grew from roughly $1 billion at the start of 2025 to $10 billion last year, then $30 billion earlier this year, and now $47 billion. The primary engine is Claude Code, Anthropic's coding assistant, which has become the default agentic coding tool for a large and growing share of professional developers. Enterprise API usage and the Claude consumer product round out the revenue base.

OpenAI was valued at $852 billion in late March after a record-breaking $122 billion funding round. Anthropic's $965 billion now places it comfortably ahead. The two companies have also diverged on revenue trajectory — Anthropic recently moved ahead of OpenAI on annual recurring revenue, a remarkable position given that OpenAI has far more consumer users through ChatGPT. The difference is enterprise and developer revenue, where Anthropic's Claude Code and API business command premium pricing and stickier contracts.

The funding also brought strategic infrastructure partners. Anthropic highlighted relationships with Micron, Samsung, and SK hynix for memory and storage, alongside compute agreements: up to five gigawatts of new capacity with Amazon, five gigawatts of next-generation TPU capacity with Google and Broadcom, and GPU access through SpaceX. This is the infrastructure needed to train and serve frontier models at the scale Anthropic's revenue now demands.

What This Means for Claude Users

If you use Claude — through the consumer app, Claude Code, or the API — Anthropic's financial position directly affects your experience. More capital funds more compute, which funds better models and faster features. The release of Opus 4.8 on the same day as the funding announcement is itself evidence: Anthropic is shipping improvements at an accelerating pace (4.8 came just 41 days after 4.7), and the capital to sustain that pace is now secured.

The open question is pricing. As a private company racing toward an IPO, Anthropic has kept consumer pricing competitive (Claude Pro at $20/month, Opus 4.8 at the same API rates as 4.7). But public company earnings pressure historically pushes pricing upward. The fact that Opus 4.8 launched at unchanged prices — and fast mode actually got three times cheaper — is a positive signal for now. Whether that holds through an IPO is uncertain. Our AI subscription audit guide helps you evaluate whether each AI subscription earns its cost.

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The IPO Race With OpenAI

The valuation milestone arrives as both companies prepare to go public. OpenAI is preparing to file its confidential IPO prospectus in the coming days or weeks, reportedly targeting a public debut as soon as September. Anthropic's $965 billion valuation positions it as the more valuable company heading into that race. Meanwhile, Elon Musk's SpaceX (which merged with his AI startup, valued at $1.25 trillion combined) filed its own IPO prospectus recently, adding a third frontier player to the public-market competition.

The IPO race matters for the broader AI industry because public markets impose discipline that private funding doesn't. Quarterly earnings, shareholder expectations, and transparency requirements will shape how these companies balance growth against profitability, safety research against revenue, and consumer pricing against margins. Anthropic has positioned itself as the safety-first, enterprise-strong alternative; OpenAI as the consumer-dominant, broad-platform play. The public markets will test which positioning commands the higher sustained valuation.

Valuation Timeline at a Glance

How Claude Code Became the Engine Behind the Numbers

To understand Anthropic's valuation, you have to understand Claude Code. While consumer chatbots get the headlines, Anthropic's revenue explosion has been driven disproportionately by its agentic coding tool, which has become deeply embedded in professional software development workflows. Developers don't just try Claude Code and move on — they integrate it into their daily work, their CI pipelines, and increasingly their large-scale engineering operations. That stickiness is what investors are paying for. A consumer who churns out of a chatbot subscription is easy to replace; an engineering org that has built its workflow around Claude Code is not.

This is the structural advantage behind the $47 billion run rate. Enterprise and developer revenue is higher-margin, more predictable, and stickier than consumer subscriptions. It also compounds: as teams adopt Claude Code, they expand usage across more developers, more projects, and more advanced features like the new dynamic workflows that ship with Opus 4.8. Each capability improvement — better agentic coding, codebase-scale migrations, cheaper fast mode — directly increases the value an engineering org gets, which justifies expanded contracts. The model improvements and the revenue growth reinforce each other.

What the IPO Race Means for the Broader Market

The timing of Anthropic's funding and Opus 4.8 launch isn't coincidental — both are positioning moves ahead of an expected IPO. Going public requires demonstrating not just growth but a credible narrative about durable competitive advantage. By surpassing OpenAI in valuation while simultaneously shipping a model that leads key benchmarks, Anthropic is building exactly that narrative: we're the most valuable, the fastest-improving, and the enterprise choice. The $965 billion valuation becomes a data point in the IPO story.

For the broader AI market, the Anthropic-OpenAI IPO race will be a defining event of 2026. It will set public-market benchmarks for how AI companies are valued, establish disclosure norms for the industry, and test whether public investors share private investors' enthusiasm. If both companies command strong public valuations, it validates the entire AI investment thesis and likely accelerates funding across the sector. If the public markets prove more skeptical than private ones, it could trigger a broader repricing. Either way, these two IPOs will shape AI funding for years — which is why a model launch and a funding round landing on the same day is more than a coincidence; it's a statement of intent.

Frequently Asked Questions

Is Anthropic now worth more than OpenAI?

Yes. As of May 28, 2026, Anthropic's $965 billion valuation surpasses OpenAI's $852 billion (set in late March 2026). This makes Anthropic the most valuable AI startup in the world. The positions could shift again when OpenAI raises its next round or files for IPO, but for now Anthropic leads.

How much revenue does Anthropic make?

Anthropic's annualized revenue run rate reached $47 billion as of May 2026, up from $30 billion earlier in the year and roughly $10 billion in actual revenue last year. The growth is driven primarily by Claude Code, its coding assistant, along with enterprise API usage and the consumer Claude product.

When will Anthropic IPO?

Anthropic hasn't confirmed an exact date, but both it and OpenAI are widely expected to go public later in 2026. OpenAI is reportedly targeting September. The $965 billion private valuation and $47 billion revenue run rate position Anthropic for one of the largest tech IPOs in history whenever it files.

Will the funding make Claude more expensive?

Not immediately — Opus 4.8 launched at the same price as 4.7, and fast mode got three times cheaper. The funding is being used for compute infrastructure and research, not justifying price increases. However, IPO pressure could push pricing upward over time as the company prioritizes profitability for public shareholders.

Who invested in Anthropic's $65B round?

The Series H was led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, with co-leads including Capital Group, Coatue, D1 Capital Partners, GIC, ICONIQ, and XN. Additional investors included Blackstone, Brookfield, and Temasek. The round also included $15 billion in previously committed hyperscaler investments, with $5 billion from Amazon.

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