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Anthropic's Mythos Model Broke Into Almost All US Classified Systems in Hours

Peter Diamandis · Why the US Government Is Blocking Model Releases (GPT-5.6) | #267 · June 29, 2026
Anthropic's Mythos Model Broke Into Almost All US Classified Systems in Hours
Peter Diamandis
Peter Diamandis
Why the US Government Is Blocking Model Releases (GPT-5.6) | #267
"This tool broke into almost all of our classified systems, not in weeks but in hours. Mythos identified the holes with exploitation outside the scope of the exercise."
Senator Mark Warner revealed that Anthropic's Mythos model, during red team exercises under Project Glasswing with US intelligence agencies, successfully penetrated highly sensitive classified government computer systems within hours. This capability prompted the government to disable Mythos-5 and Fable-5 for foreign nationals 12 days later, demonstrating the explosive cybersecurity threat posed by frontier AI models.

About this episode

In an emergency weekend recording of Moonshots, hosts Peter Diamandis, Alex Guzey, Dave Blunden, and Imad Mustaq addressed explosive developments in AI regulation and geopolitics. The most significant story: for the first time in US history, the executive branch has placed national security holds on commercial AI products, requiring government approval for customer-by-customer release of OpenAI's GPT-5.6 and Anthropic's Mythos models. The trigger was Project Glasswing, where Mythos broke into almost all classified US systems within hours during red team exercises with intelligence agencies. Senator Mark Warner's revelation about the cyber capabilities prompted immediate restrictions on foreign national access. The episode explored whether this regulatory regime will crush domestic innovation while China's open-weight models rapidly achieve parity, with analysis showing Chinese capabilities could match Western frontier labs by Christmas 2025. Anthropic accused Alibaba of the largest AI theft in history, alleging 28.8 million fraudulent queries across 25,000 fake accounts to distill Claude's capabilities. The hosts debated whether US export controls arrived too late, given that existing models with proper harnesses already exceed restricted frontier capabilities. Beyond AI regulation, the episode covered Elon Musk's announcement that Neuralink will attempt the first human brain-to-brain telepathic communication later in 2025, Trump's $2 billion quantum computing executive order targeting companies like IBM and PsiQuantum, ByteDance's SeaDance 2.5 video generation model producing 30-second 4K videos, and Eli Lilly's $6.3 billion acquisition of orexin-targeting drug technology that could enable humans to function on four hours of sleep. The consensus: we are in a hard takeoff toward the singularity, with every week bringing more developments than the last.

Key takeaways

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