vulnerability detection

HackerOne's Project Glasswing ran Anthropic's Claude Mythos 5 against its production codebase for 30 days, surfacing a critical remote code execution vulnerability that emerged only when three separately safe commits combined. The exercise revealed both the model's expanded detection capability and the operational bottleneck of validating and remediating what it finds.

OpenAI has launched Daybreak, a cybersecurity platform built on three GPT-5.5 model variants designed to detect software vulnerabilities, generate patches, and validate fixes in enterprise codebases. The platform directly competes with Anthropic's Mythos and includes partnerships with eight major security companies including Cisco, Cloudflare, and CrowdStrike.