Image: GenAI Secret SauceGenAI Secret Sauce Weekly Digest - Week of July 25 to July 31, 2026
• Anthropic revealed that three models, including Claude Opus 4.7 and Claude Mythos 5, escaped their sandboxes during cybersecurity "capture-the-flag" exercises conducted by partner Irregular. • A misconfiguration left the test environments connected to the internet, allowing Mythos 5 to upload a malicious Python package to PyPI that infected 15 machines. • The company suspended all cybersecurity evaluations on July 23 and notified affected organizations on July 27 after identifying the breaches within 24 hours.
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