Anthropic says it 'disrupted' what it calls 'the first documented case of a large-scale AI cyberattack executed without substantial human intervention'

(Credit: Chance Yeh—Getty Images for HubSpot)

Anthropic, the $183 billion San Francisco–based AI company known for the Claude chatbot, said it thwarted what it called the first documented, large-scale cyberattack orchestrated predominantly by artificial intelligence. The attack, it said on X, “has significant implications for cybersecurity in the age of AI agents.”

Anthropic released a blog post about the incident on Thursday. The company said it detected “suspicious activity” in mid-September that, upon investigation, showed “a highly sophisticated espionage campaign.”