- Course
Security Hot Takes: Why Fable Is the Most Dangerous AI Model You Can Almost Use
Fable 5 brings Mythos-class AI to the public, but with guardrails that catch defenders as often as attackers. This episode breaks down what that means for every security role, from the analyst to the CISO.
Beginner
- Course
Security Hot Takes: Why Fable Is the Most Dangerous AI Model You Can Almost Use
Fable 5 brings Mythos-class AI to the public, but with guardrails that catch defenders as often as attackers. This episode breaks down what that means for every security role, from the analyst to the CISO.
Beginner
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- Security
What you'll learn
On June 9, 2026, Anthropic released Claude Fable 5, the first Mythos-class AI model made broadly available to the public. The same underlying model that autonomously discovered and exploited zero-day vulnerabilities across every major OS and browser is now accessible via a standard API key. The capability is real. The question is who gets to use it for what.
This episode covers what Mythos-class AI can actually do, how Fable 5's guardrail routing works in practice — and why it catches routine defensive work alongside genuinely dangerous queries — and what the access tiers (Cyber Verification Program, Project Glasswing, ZDR exclusion) mean for practitioners on the ground.
Aimed at every security role: analysts and IR teams get a clear read on where Fable 5 helps and where it trips; CISOs get the strategic framing on asymmetry and budget; business leaders get the risk conversation they need to have.
Security Hot Takes: Why Fable Is the Most Dangerous AI Model You Can Almost Use
Beginner
Table of contents
Matt has a degree in Chemical engineering and a PhD in mathematical chemistry. He is also a GIAC certified incident handler and penetration tester and has regulated cyber security in the UK civil nuclear sector for many years.
Michael Teske is an Author Evangelist with Pluralsight helping people elevate their skills. He has 20+ years of experience in IT Ops, including 17 as an IT instructor at a community college.
