In a momentous shift within the rapidly evolving artificial intelligence landscape, Anthropic has officially eclipsed OpenAI to claim the title of the world’s most valuable AI startup. The San Francisco-based company announced on Thursday a new financing round totaling $65 billion, which elevates its pre-money valuation to an impressive $900 billion. This figure places Anthropic ahead of OpenAI's last reported valuation of $852 billion.

The substantial funding round was spearheaded by prominent investment firms including Green Oaks Capital, Sequoia Capital, Altimeter Capital, and Dragoneer Investment Group. Critically, it also attracted new strategic investors like Samsung, Micron, and SK Hynix—all chip companies whose advanced hardware is indispensable for the development and operation of sophisticated AI systems. Since its establishment in 2021, Anthropic has now accumulated over $130 billion in total funding, as reported by PitchBook. Its existing investor roster boasts significant names such as Amazon, Google, Capital Group, Menlo Ventures, and Lightspeed Venture Partners.

The speed of Anthropic's ascent is particularly noteworthy. Just 62 days prior, OpenAI, widely credited with inaugurating the modern AI era with its ChatGPT launch in 2022, had announced a $122 billion fundraise that valued it at $730 billion. Achieving such a valuation took OpenAI approximately a decade. Anthropic, founded merely four years ago by former OpenAI researchers, including CEO Dario Amodei and his sister Daniela, has managed to surpass this milestone in half the time.

Anthropic's financial performance underscores its rapid growth. The company’s revenue run rate, which projects annual revenue based on current performance, surpassed $47 billion this month. This surge is predominantly fueled by its Claude Code product, which has seen adoption by hundreds of businesses since Anthropic significantly enhanced its coding capabilities in November 2025. Concurrent with the funding announcement, Anthropic unveiled Claude Opus 4.8, its new flagship AI model. This advanced model demonstrates superior performance across all publicly available AI systems in "vibe coding"—the process where AI generates functional software from plain English prompts—scoring 10% higher than its predecessor on the Vals AI benchmark. It also exhibits enhanced capabilities in mathematics.

Several factors explain Anthropic's remarkable rise over OpenAI. A core reason is its unwavering focus on AI safety, a philosophy inherently built into its model training processes rather than treated as an afterthought. This commitment to safety has emerged as a significant competitive advantage, particularly with enterprise customers operating in highly regulated sectors like finance and healthcare. In these industries, predictable and auditable model behavior is a critical procurement requirement. Anthropic's credibility in this area also enabled it to effectively navigate a recent public disagreement with the Pentagon concerning AI's application in warfare, and the company notably provided counsel to Pope Leo XIV on his papal encyclical addressing the potential risks of AI to humanity.

In contrast, OpenAI has contended with internal challenges, including questions surrounding its leadership stability and the departure of several senior researchers. It has also grappled with the immense pressure of managing a company that has experienced growth at an almost unprecedented pace. While OpenAI continues to hold a dominant position in the consumer AI market through ChatGPT, Anthropic has steadily gained significant ground in the enterprise and developer markets, where substantial financial opportunities lie.

For various industry stakeholders—including developers, enterprises, and investors—this shift in leadership signals that the artificial intelligence race is far from a singular contest. For everyday users, it means that Anthropic, the force behind the Claude AI, now stands as the most heavily resourced AI laboratory globally. This increased capital is poised to further enhance its products, expand its infrastructure, and propel its research forward.

As of May 2026, the rankings of the top five most valuable AI startups, based on the most recent confirmed data, are as follows: Anthropic leads with a $900 billion pre-money valuation. OpenAI follows at $852 billion, having closed its record-breaking $122 billion funding round in March 2026. Elon Musk’s AI venture, xAI, creator of Grok, merged with SpaceX in February 2026, a deal that valued xAI at $250 billion; however, the combined entities' target for a June IPO complicates a direct comparison with pure AI startups. Perplexity AI, the AI-powered search company, is valued at approximately $20 billion following a March 2026 funding round that included $830 million for European data center expansion. Mistral AI, recognized as Europe’s leading frontier model company, completes the top five with an approximate valuation of $14 billion.

Both Anthropic and OpenAI are reportedly considering public offerings, with SpaceX already having filed its IPO prospectus. Whichever company reaches the market first, and at what valuation, will undeniably establish a crucial benchmark for the worth of AI companies in the public financial markets.