Microsoft launches custom cybersecurity AI model, cuts security costs in half

Microsoft unveiled MAI-Cyber-1-Flash, a compact security model built in-house, embedded in MDASH (a multi-agent system for finding and fixing software vulnerabilities). The model scores 96% on CyberGym—a benchmark measuring how well AI systems reason over large codebases to find real vulnerabilities—and beats frontier models including Mythos, Gemini, and GPT while cutting costs roughly in half compared to Microsoft's current production configuration.