Anthropic Opens Claude Security Tools with Project Glasswing

Project Glasswing — What's New?

Anthropic has announced an expansion of Project Glasswing, making security tools previously used with Claude Mythos Preview available to qualifying customers upon request. The tools include skills, a Claude harness, and a threat model builder.

Why AI Security Tools Matter Now

As AI models become more capable, the risk of misuse grows proportionally. Anthropic's approach of building security tools alongside model development represents a shift toward proactive safety. Rather than reacting to threats after deployment, these tools help identify vulnerabilities before they can be exploited.

What Tools Are Available?

The expanded toolkit includes skills for specialized security tasks, a Claude harness for controlled testing environments, and a threat model builder that helps security teams systematically identify potential attack vectors. Anthropic has also published a dashboard of open-source vulnerabilities disclosed by Mythos Preview.

The Bigger Picture for AI Safety

By sharing security tools more broadly, Anthropic is setting a precedent for AI companies to treat safety infrastructure as a public good. The published vulnerability dashboard creates transparency and allows the broader security community to benefit from Anthropic's safety research.

FAQ

Q: What is Project Glasswing? A: An Anthropic initiative to share security tools and infrastructure developed for testing AI model safety with qualifying customers and partners.

Q: What is the Claude harness? A: A controlled testing environment for evaluating AI model behavior under various conditions, helping identify potential security vulnerabilities.

Q: Who can access these tools? A: Qualifying customers can request access. Anthropic also plans to expand Project Glasswing to additional partners over time.

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