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AI code security with Claude Mythos Preview: Inside Tenable’s 500+ hours of testing for Project Glasswing

medtenablePublished 2026-08-06

<p>We spent 500+ hours and 40 billion tokens testing Anthropic’s Claude Mythos Preview for Project Glasswing. The takeaway: frontier AI won't run your code security program, but used well, it can make one even stronger.</p><div class="blog-see-also"><div class="col-sm-12"><h2><strong>Key takeaways</strong></h2><ol><li><strong>Frontier AI dramatically scales security testing.</strong> In one month,

Attributed threat actors

MITRE ATT&CK techniques

Original source: https://www.tenable.com/blog/ai-code-security-with-claude-mythos-preview-inside-tenables-500-hours-of-testing-for-project