Claude Mythos: China Reacts - by Irene Zhang - ChinaTalk

"collecting protection money makes money too"

On April 7th, Anthropic announced Claude Mythos Preview, a new AI model that it said possessed particularly strong cybersecurity capabilities. Some of these capabilities, according to Anthropic’s blog post, were not the result of deliberate training, but rather emerged as a consequence of general improvements. Mythos independently identified and patched a 16-year-old vulnerability in the online media library FFmpeg. It also escaped a restricted sandbox and leaked information to the open internet. Anthropic says “it’s about to become very difficult for the security community” and is not…

related reading

• Claude Mythos: China Reactschinatalk.media
• Project Glasswing: Securing critical software for the AI era \ Anthropicanthropic.com
• Assessing Claude Mythos Preview’s cybersecurity capabilities \ Anthropicred.anthropic.com
• Claude Mythos Preview System Cardwww-cdn.anthropic.com
• How scary is Claude Mythos? 303 pages in 21 minutesforum.effectivealtruism.org
• Measuring LLMs’ ability to develop exploits \ Anthropicred.anthropic.com
• Mythos is just the beginningsubstack.com
• Discovering cryptographic weaknesses with Claude \ Anthropicanthropic.com
• Claude Mythos Preview System Cardwww-cdn.anthropic.com
• Claude Mythos knows when it's breaking the rules — and tries to hide itsubstack.com
• Statement from Dario Amodei on our discussions with the Department of War \ Anthropicanthropic.com
• Countering misuse of AI: September 2026 / Anthropicanthropic.com