Some call him a doomer. Others see him as a responsible technologist. Here’s how Dario Amodei’s thinking on artificial intelligence was shaped.

© Ūla Šveikauskaitė

Greg Brockman, OpenAI’s president and co-founder, said internally that the super PAC, Leading the Future, had become a “distraction” for the A.I. company.

© Jason Henry for The New York Times

Employees and security researchers said that they had cautioned the company on safely testing its A.I. models and strengthening its corporate infrastructure, but that OpenAI did not listen.

© Manuel Orbegozo for The New York Times

Newly unsealed court documents showed concern within Microsoft and OpenAI over the use of millions of news articles to develop A.I. systems.