Dario Amodei: Anthropic CEO Net Worth, Age & AI Slowdown

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Dario Amodei is the CEO and co-founder of Anthropic, the company behind Claude, and the person whose essays on AI risk are now cited by governments. A Princeton-trained physicist and former head of research at OpenAI, since September 2026 he has been the loudest voice calling on the industry to slow down. Facts and figures checked September 17, 2026.

From Physics to OpenAI

Amodei grew up in San Francisco, was on the US physics olympiad team in 2000, started college at Caltech, completed his physics degree at Stanford, and earned his PhD in biophysics from Princeton, studying collective behavior of neural circuits. After a postdoc at Stanford Medicine, he worked for a year at Baidu, then at Google, and in 2016 joined OpenAI, where he rose to VP of Research and co-created the GPT-2 and GPT-3 series. In 2021 he left with a group of colleagues due to differences over the company’s direction and founded Anthropic together with his sister Daniela.

Anthropic and Claude

Anthropic builds the Claude models, including Claude Fable 5.1, which in 2026 competes for the top of the AI model rankings, and the coding agent Claude Code. In November 2023, when OpenAI’s board fired Sam Altman, they offered Amodei the CEO role and proposed merging both companies; he declined. In February 2026 he rejected demands from the US Department of Defense to remove from contracts the ban on using Claude for mass surveillance and fully autonomous weapons; the administration designated Anthropic a “supply chain risk,” and a federal court in March 2026 blocked these actions as retaliation for protected speech.

Two Essays That Shaped the Debate

In October 2024 he published “Machines of Loving Grace,” an essay about how AI could accelerate medicine and economic growth; his personal motivation was his father’s death from hepatitis C a few years before an effective cure appeared. In January 2026 he released “The Adolescence of Technology,” a catalog of five risks: systems acting against humans, weapons of mass destruction, power takeover, economic disruption (half of entry-level office jobs could disappear in 1-5 years), and consequences no one predicts. I wrote about his labor market forecasts in the article Amodei on entry-level positions.

September 2026: Call to Slow Down

In September 2026 Amodei called on the industry to slow the development of the most advanced models and announced that Anthropic would give independent evaluators permanent access to its models to verify whether the company is keeping its own commitments. A week later Sam Altman publicly backed him. I described the details of the plan in the articles Amodei’s plan to slow AI and Altman, Musk and Amodei together.

Frequently Asked Questions

How old is Dario Amodei?

He was born in 1983 in San Francisco, so he is 42 or 43 years old; he does not publicly share his exact birth date.

What is Dario Amodei’s net worth?

Forbes estimated his net worth in 2026 at $15.5 billion, mainly in Anthropic shares. This is a paper valuation, dependent on the company’s valuation.

Who is Daniela Amodei?

Dario’s sister, four years younger, co-founder and president of Anthropic. They left OpenAI together in 2021.

Sources checked September 17, 2026: Wikipedia EN “Dario Amodei” with citations (Forbes, Time, Wired, court ruling from March 26, 2026), essays at darioamodei.com, our articles about the September 2026 appeal.

Reader Questions

What does Anthropic do and how is it different from OpenAI?

Anthropic is an AI company founded in 2021 by former OpenAI employees, including Dario and Daniela Amodei. It creates the Claude model family and the Claude Code coding agent. The main difference is the approach to safety - Anthropic places greater emphasis on so-called constitutional AI and restrictions on model use, exemplified by Amodei’s rejection of US Department of Defense demands to remove bans on using Claude for surveillance and autonomous weapons.

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