News · curated 2 Sep 2026
Claude Mythos only model to complete full cyber kill chain, experts say
First reported theregister.com
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Benchmarks showing frontier AI models can autonomously complete a cyber kill chain signal that mainstream AI-enabled attacks from criminals and nation-states are becoming imminent, raising the stakes for critical-infrastructure defenders.
The Register reports on Booz Allen's first Cyber Weapon Index, which evaluated 18 US and Chinese AI models on their ability to autonomously identify vulnerabilities, build offensive capabilities, and execute attacks; only Anthropic's Claude Mythos completed the full cyber kill chain autonomously, though most other models are expected to reach the same level within six months. The piece also cites OpenAI's disclosure that its forthcoming Astra model crossed a 'critical' cybersecurity capability threshold for finding and exploiting zero-days without human guidance.