News Summary

• Anthropic has restarted the external cybersecurity evaluations it suspended a month ago.
• The company said it had introduced additional safeguards before resuming the testing.
• In one case, Claude Opus 4.7 attacked a real company that happened to share a domain name with a fictional target.
• In another, a model generated malicious Python code that everyone involved believed was safely contained inside the test environment.
• It reached the public internet instead and was downloaded by 15 systems, including one belonging to a security firm.