News Summary

• Anthropic says its AI models gained unauthorized access to the systems of three different organizations during cybersecurity testing.
• The company says Claude reached the internet “from within or while interacting" with a third-party evaluation environment.
• The announcement comes more than a week after OpenAI revealed that one of its AI agents had hacked into Hugging Face during a separate cybersecurity test.
• Anthropic acknowledged that if the AI lab and its testing partner had implemented more “defense-in-depth” measures, they could have prevented the incidents.