Dario and Daniela Amodei, siblings who departed OpenAI in 2021 to prioritize AI safety, have built Anthropic into the world's most valuable AI startup at $965 billion, surpassing OpenAI's $852 billion valuation. The company just closed a $65 billion Series H funding round, a historic capital infusion that reflects investor confidence in Anthropic's business model and the growing demand for its Claude AI assistant.

Who Are Dario and Daniela Amodei?

The Amodei siblings grew up in San Francisco's Mission District in a family rich in educational values but not venture capital wealth. Their father, Riccardo Amodei, was an Italian leather craftsman; their mother, Elena Engel, managed library renovation and construction projects. Dario was born in 1983 and showed early mathematical brilliance, making the 2000 U.S. Physics Olympiad team and eventually earning a Ph.D. in physics and biophysics from Princeton, where he studied neural circuits.

Before founding Anthropic, Dario held senior research positions at Baidu, Google Brain, and OpenAI. At OpenAI, he served as Vice President of Research and was instrumental in developing GPT-2, GPT-3, and reinforcement learning from human feedback (RLHF), a technique that makes AI systems more aligned with human preferences. His sister Daniela led OpenAI's policy and safety teams. In early 2021, both left the company, along with several other senior researchers, primarily because they disagreed with OpenAI's approach to AI safety.

Why Did They Leave OpenAI, and What Did They Build?

The departure was not a casual career move. According to multiple accounts, the founding group made a decision rooted in conscience rather than commerce. They believed that the trajectory of AI development carried real safety risks and that those risks deserved more careful attention than their former employer was willing to provide. Anthropic was founded in 2021 as a Delaware Public Benefit Corporation, with Dario serving as CEO and Daniela as President.

For the first two years, Anthropic operated quietly, deliberately avoiding the flashy product launches and public personalities that defined OpenAI. Instead, the company focused on research, publishing influential papers on Constitutional AI, an approach that gives AI systems a written set of principles to follow rather than relying purely on human feedback. Claude, Anthropic's AI assistant, did not launch publicly until March 2023, well after ChatGPT had already become a cultural phenomenon.

By May 2026, Claude had evolved from a single assistant into a comprehensive product ecosystem. The company now offers Claude Code for software development, Claude Cowork for collaboration, Claude Security for cybersecurity applications, and multiple model tiers including Opus, Sonnet, Haiku, and Mythos Preview. The most capable publicly available model, Claude Opus 4.8, can process roughly 1 million tokens, equivalent to about 750,000 words of text at once.

How Did Anthropic Become More Valuable Than OpenAI?

The answer lies in execution, revenue growth, and investor confidence. While OpenAI captured the cultural moment with ChatGPT, Anthropic built a business model focused on enterprise customers and developers. The company makes money through enterprise contracts and paid subscriptions, not advertising, and reinvests that revenue into Claude development.

The revenue trajectory has been extraordinary. Anthropic reported annualized revenue of about $875 million in early 2025. By the end of 2025, the run-rate had climbed to about $9 billion. By April 2026, it reached $30 billion, and by May 2026, it exceeded $47 billion. These are run-rate figures rather than audited annual revenue, but they still represent one of the steepest revenue curves in technology history.

The $65 billion Series H round, led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, values Anthropic at $965 billion, just below the $1 trillion mark. If Anthropic went public at this valuation tomorrow, it would rank as the 12th most valuable company in the United States, sitting just below the trillion-dollar club that includes Apple, Microsoft, Nvidia, Google, and Amazon.

What Makes Anthropic's Governance Model Unique?

Beyond product and revenue, Anthropic has built governance infrastructure that sets it apart. The Long-Term Benefit Trust is designed as an independent body that will eventually gain the power to select a majority of the company's board, with the explicit goal of aligning the company with "the long-term benefit of humanity" rather than only shareholder returns. This structure is reinforced by the Responsible Scaling Policy and the Anthropic Institute, launched in March 2026 under Jack Clark.

These governance mechanisms are not merely decorative. They function as legitimacy infrastructure and part of Anthropic's public product. Whether this structure can fully counteract capital pressure remains an open question, but it unquestionably turns governance into a competitive differentiator in the AI industry.

How Is Anthropic Positioned Against Major Cloud Providers?

Anthropic has built a rare position in the cloud ecosystem. The company is deeply integrated with all major cloud providers without being wholly captive to any single one:

• Amazon Web Services: Amazon committed up to $4 billion beginning in 2023 and completed that investment in 2024. By April 2026, Anthropic announced an expanded relationship involving over $100 billion in AWS technology commitments over ten years, up to 5 gigawatts of compute, and a new $5 billion investment with up to $20 billion more possible.
• Google Cloud: Google Cloud became an early preferred cloud partner in 2023. Reuters reported that Alphabet would invest up to $40 billion in Anthropic and that Anthropic committed to spend $200 billion on Google Cloud over five years.
• Microsoft and Nvidia: Both companies announced major strategic investments in 2025, with Claude made available across Microsoft Foundry and other platforms.

This multi-cloud strategy gives Anthropic leverage and flexibility that few AI startups possess.

What Does This Mean for the AI Industry?

For most of the AI boom, the working assumption was that OpenAI was the central player and everyone else competed for second place. That picture has shifted meaningfully. Anthropic is no longer the careful, quieter alternative; it is now the front-runner on every major metric, including valuation and revenue growth.

"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," said Krishna Rao, Chief Financial Officer at Anthropic.

Krishna Rao, Chief Financial Officer at Anthropic

Both Anthropic and OpenAI are moving toward going public. OpenAI's structural reorganization and IPO speculation have been a steady drumbeat for the last two years. Anthropic's CFO framed the new funding round in terms of capacity rather than IPO timeline, but the company is now of a size where public listing is increasingly a question of when rather than whether.

The original bet that Dario and Daniela Amodei made in 2021 was rooted in conscience, not commerce. They believed that frontier AI development could be done more safely and that doing so was worth the slower pace it might require. Five years later, the company they founded is more valuable than the one they left. Whether that vindicates the safety-first thesis or simply shows that any well-executed AI company would have become enormously valuable in this market remains an open question. What is clear is that the people who walked out of OpenAI over a disagreement about how to build AI now run the most valuable AI startup on Earth.