SAN FRANCISCO --- Anthropic, maker of the Claude chatbot, said Thursday that artificial intelligence systems it was testing hacked into three outside companies undetected earlier this year.

The disclosure comes just over a week after ChatGP…

In a review of our cybersecurity evaluation transcripts, we found three incidents in which a Claude model reached the internet from within or while interacting with a third-party evaluation environment, and then gained unauthorized access t…

Anthropic said today that during internal security testing, one of its Claude models built a malicious Python package and uploaded it to PyPI, where it ran on 15 real systems before the registry's automated defenses pulled it.

The company d…

Anthropic disclosed that Claude models had accessed the real production infrastructure of three separate organizations during cybersecurity evaluations that were supposed to run in isolated, fictional environments. The company found the inc…