In a move aimed at strengthening digital security, Anthropic has launched Project Glasswing, a new initiative focused on testing advanced AI to detect and address software vulnerabilities at scale.
The project brings together major technology firms and critical infrastructure organisations to evaluate a high-capability AI system. This unreleased model is designed with strong coding and reasoning abilities, allowing it to analyse vulnerabilities in operating systems, web browsers, and widely used software. Early testing has reportedly identified several serious flaws, including some that had remained undiscovered for years.
The model, referred to by partners as Claude Mythos Preview, will not be publicly released due to concerns around misuse. Instead, access is restricted to a select group of collaborators within the tech and cybersecurity ecosystem.
Microsoft highlighted the broader impact of the initiative. “As we enter a phase where cybersecurity is no longer bound by purely human capacity, the opportunity to use AI responsibly to improve security and reduce risk at scale is unprecedented,” said Igor Tsyganskiy. “Joining Project Glasswing… allows us to identify and mitigate risk early… When tested against CTI-REALM, our open-source security benchmark, Claude Mythos Preview showed substantial improvements compared to previous models.”
Amazon Web Services confirmed it has already started using the model internally. “At AWS, we build defenses before threats emerge… AI is central to our ability to defend at scale,” said Amy Herzog. “We’ve been testing Claude Mythos Preview in our own security operations… where it’s already helping us strengthen our code.”
Google stressed the importance of collaboration. “Google is pleased to see this cross-industry cybersecurity initiative coming together… It’s always been critical that the industry work together on emerging security issues,” said Heather Adkins. “We have long believed that AI poses new challenges and opens new opportunities in cyber defense.”
Anthropic said the initiative aims to strengthen defensive cybersecurity as AI-driven threats become more advanced. The model can detect vulnerabilities and, in some cases, help understand how they might be exploited, highlighting both its benefits and risks.
The company is also focusing on improving open-source security, offering support to maintainers who often lack resources. It has committed up to $100 million in usage credits and $4 million for open-source security efforts, with plans to expand participation.
The launch comes as concerns grow over AI-powered cyberattacks. Anthropic positions Project Glasswing as an early effort to ensure advanced AI is used responsibly and primarily for defence.
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