Model Detail
MYTHOS-26B-A4B-PRISM-PRO-DQ-MLX
—
Anthropic’s Mythos breach was humiliating
Anthropic's tightly controlled rollout of Claude Mythos has taken an awkward turn. After spending weeks insisting the AI model is so capable at cybersecurity that it is too dangerous to release publicly, it appears the model fell into the wrong hands anyway. According to Bloomberg, a "small group of
Mythos and the Unverified Cage: Z3-Based Pre-Deployment Verification for Frontier-Model Sandbox Infrastructure
arXiv:2604.20496v1 Announce Type: cross Abstract: The April 2026 Claude Mythos sandbox escape exposed a critical weakness in frontier AI containment: the infrastructure surrounding advanced models remains susceptible to formally characterizable arithmetic vulnerabilities. Anthropic has not publicly
Anthropic’s Mythos rollout has missed America’s cybersecurity agency
Several US federal agencies are taking up Anthropic's new cybersecurity model to find vulnerabilities, but one is reportedly not getting in on the action: the nation's central cybersecurity coordinator. On Tuesday, Axios reported that the Cybersecurity and Infrastructure Security Agency (CISA) didn'
Unauthorized group has gained access to Anthropic’s exclusive cyber tool Mythos, report claims
Anthropic told TechCrunch it is investigating the claims, but maintains that there is no evidence that its systems have been impacted.
Sam Altman throws shade at Anthropic’s cyber model, Mythos: ‘fear-based marketing’
This week, during a podcast appearance, OpenAI CEO Sam Altman called out his competitor's new cybersecurity model, noting that the company was using fear to make its product sound more impressive than it actually is.
NSA spies are reportedly using Anthropic’s Mythos, despite Pentagon feud
NSA is said to be using Anthropic's restricted Mythos AI model.
