China-Linked Group Suspected of Accessing Anthropic's Restricted Mythos Model

Forensic Summary

The White House reportedly believes a China-linked group accessed Anthropic's Mythos AI model, prompting export restrictions on the technology. If confirmed, the breach represents a significant national security threat, as adversaries could exploit the model directly or use knowledge distillation to replicate its capabilities. Separately, reports of jailbreak vulnerabilities in Mythos and Fable compound concerns about unauthorised access to frontier AI systems.

Read the full technical deep-dive on Grid the Grey: https://gridthegrey.com/posts/china-linked-group-suspected-of-accessing-anthropic-s-restricted-mythos-model/