@AnthropicAI: Introducing Project Glasswing:...

Introducing Project Glasswing: an urgent initiative to help secure the world’s most critical software.

It’s powered by our newest frontier model, Claude Mythos Preview, which can find software vulnerabilities better than all but the most skilled humans.
anthropic.com/glasswing

We’ve partnered with Amazon Web Services, Apple, Broadcom, Cisco, CrowdStrike, Google, JPMorganChase, the Linux Foundation, Microsoft, NVIDIA, and Palo Alto Networks.

Together we’ll use Mythos Preview to help find and fix flaws in the systems on which the world depends.

Mythos Preview has already found thousands of high-severity vulnerabilities—including some in every major operating system and web browser.

Given the pace of AI progress, it won't be long before models this capable are widespread.

But there are strong reasons for optimism: AI will also be invaluable for defensive work.

We do not plan to make Mythos Preview generally available. Our goal is to deploy Mythos-class models safely at scale, but first we need safeguards that reliably block their most dangerous outputs.

We’ll begin testing those safeguards with an upcoming Claude Opus model.

We’re committing up to $100M in Mythos Preview usage credits for our partners and over 40 other organizations that maintain critical software, including open-source projects.

Anthropic will report back what we learn.

Project Glasswing is just a starting point.

No organization can solve these cybersecurity problems alone: industry, open source, researchers, and governments all have essential roles to play.

You can read a detailed technical report on the software vulnerabilities and exploits discovered by Claude Mythos Preview here: red.anthropic.com/2026/mythos-pr…