Kai Bird

Kai Bird (b. 1951) is an American biographer and historian who shared the 2006 Pulitzer Prize for American Prometheus, the J. Robert Oppenheimer biography he co-wrote with Martin J. Sherwin that became the basis for Christopher Nolan’s Oppenheimer. He directs the Leon Levy Center for Biography at the CUNY Graduate Center, and his other books include The Good Spy and The Outlier.

From the atomic bomb to the algorithm

The Oppenheimer parallel has made Bird an unusually resonant AI critic. In July 2023, as the film opened, he endorsed Senator Ed Markey’s Block Nuclear Launch by Autonomous Artificial Intelligence Act, saying the bill “will send a powerful signal to the world that the United States will never take the reckless step of automating our nuclear command and control,” and arguing that Oppenheimer himself would be making the case for regulating AI today.

In December 2023 Bird joined Julian Sancton’s class action against OpenAI and Microsoft alongside fellow Pulitzer winners Taylor Branch and Stacy Schiff, alleging their books were copied without permission to train GPT models — a complaint that brands OpenAI’s foundation “rampant theft of copyrighted works.” In June 2025 he joined a further suit accusing Microsoft of training its Megatron model on a collection of roughly 200,000 pirated books.

Bird’s objection is thus twofold: as an author whose decades-long archival labor was ingested without consent or payment, and as a historian of technology’s moral hazards who wants scientists — as in 1945 — to reckon publicly with what they are building.