Anthropic is broadening Project Glasswing, its collaborative effort to detect and patch critical software vulnerabilities using artificial intelligence, by bringing approximately 150 new organizations on board across more than 15 countries, the company announced on Tuesday. This development follows yesterday's news that Anthropic had filed confidentially for an initial public offering, after securing a $65 billion funding round that valued the company at nearly $1 trillion.

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At the core of Project Glasswing is Anthropic's Claude Mythos. The company describes this model as its most powerful to date, capable of identifying thousands of zero-day vulnerabilities over the course of several weeks. In early April, Anthropic granted access to Claude Mythos Preview for 50 initial partners—including the U.S. government—so they could scan their codebases for security flaws and weaknesses.

The newly expanded list of organizations now receiving access to Mythos spans critical sectors such as power, water, healthcare, communications, and hardware. According to Anthropic, these industries were not "well-represented" in the initial cohort. Many of the new participants are companies or nonprofits that manage codebases relied upon by other organizations and governments, the company noted in a blog post.

"What each partner has in common is that a successful attack on their codebase could be catastrophic," Anthropic stated. "For most partners, we estimate that a major attack could affect more than 100 million people, with important ramifications for both global and national security."

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The expanded group includes organizations from countries considered friendly to the U.S., such as Australia, Canada, France, Germany, Italy, Switzerland, the Netherlands, Spain, Belgium, Sweden, India, Japan, New Zealand, and South Korea, according to The Financial Times, which cited a source familiar with the matter. The FT also reported several specific organizations now granted access to Mythos: U.S.-based identity and security management firm Okta; South Korean companies Samsung, SK Hynix, and SK Telecom; NATO, the U.S.-led military alliance headquartered in Brussels; and the European Union's cybersecurity agency, ENISA.

Anthropic has stated that it expects other AI companies to soon develop models as capable as Mythos Preview, which is why the firm is racing to establish safeguards within Project Glasswing. Since the release of Mythos, rival OpenAI has launched its own cybersecurity-focused model, GPT-5.5-Cyber, which it has already rolled out to a large group of partners for testing.