Pattern: AI Security Auditing Achieves 12x Multiplier in One Model Generation

Mozilla Blog·high signal

Mozilla's Firefox audit provides the first production-scale before/after comparison of AI security auditing: Opus 4.6 found 22 bugs on Firefox 148; Mythos Preview found 271 on Firefox 150 — a 12x improvement. Mozilla confirmed no bugs were beyond elite human capability, but the throughput increase is the story. This validates AI security auditing as a force multiplier, not a replacement. For builders maintaining large codebases, running frontier models as security scanners is now a cost-effective default — the ROI of one prevented CVE dwarfs the API cost.