What is Anthropic's Claude Mythos Preview?

Anthropic's latest model that autonomously finds vulnerabilities and builds exploit chains, currently limited to Project Glasswing defenders like Microsoft and Google.

How will Mythos Preview change cybersecurity?

It lowers the bar for complex hacks, forcing machine-scale defenses—but gives good guys a head start before attackers get equivalents.

When can the public access Mythos Preview?

Not yet; it's exclusive now, but capabilities will spread to other models soon, per experts.

🤖 Large Language Models

Anthropic's Mythos Preview Chains Exploits in Hours—Defenders' Narrow Window Opens

Anthropic's new Claude Mythos Preview doesn't just spot bugs—it weaves them into devastating exploit chains. Released to a elite defender consortium, it's a wake-up call before attackers catch up.

theAIcatchup Apr 10, 2026 4 min read

Anthropic Claude Mythos Preview interface displaying a chained vulnerability exploit diagram

⚡ Key Takeaways

Mythos Preview excels at multistage exploit chains, a capability once reserved for elite hackers. 𝕏
Project Glasswing gives defenders like Big Tech a temporary edge before widespread AI hacking tools. 𝕏
Expect machine-scale defenses to emerge, but open-source clones could soon empower attackers. 𝕏

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Originally reported by Wired - AI

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