Anthropic, the artificial intelligence start-up, said that Chinese state-sponsored hackers used its tools in a widespread attack.

The company claimed that A.I. did most of the hacking with limited human input and said it was a rapid escalation of the technology’s use in cybercrime.

© Marissa Leshnov for The New York Times

The company claimed that A.I. did most of the hacking with limited human input and said it was a rapid escalation of the technology’s use in cybercrime.