Rubrik's First Month in Project Glasswing: High Fidelity and Humans in the Loop
Rubrik, Thursday, August 13th, 2026
Rubrik's CTO reports on its first month using Anthropic's Mythos Preview for internal threat discovery.
Rubrik CTO Arvind Nithrakashyap reports on the company's first month in Project Glasswing, which gave its engineers access to Anthropic's Mythos Preview from June.
Rubrik assembled a multifunctional engineering and infosec tiger team focused on high-fidelity threat discovery inside its own systems, and found the bottleneck was pipeline architecture rather than review capacity.
Instead of putting business context, security context and trust boundaries into prompts, which drift, Rubrik encoded them structurally into the harness wrapping the model. The team ran whole-repository scans first, then progressively targeted passes seeded by early findings.