Claude Opus 4.7, Mythos 5, and a research model reached three real firms’ systems after a testing sandbox was accidentally left online. Anthropic found no evidence of models pursuing their own goals.

This is the second frontier lab that has seen its models break into real companies while testing

July 30 : Anthropic said on Thursday its AI Claude model hacked systems of three organizations during testing, days after rival OpenAI revealed a rogue agent had gone on a…