Google Open Sources Magika: AI-Powered File Identification Tool

Google has open-sourced Magika, a high-performance AI model for detecting file types that reportedly improves accuracy and precision—especially for hard-to-identify content like VBA, JavaScript, and PowerShell—and is used internally to route files in Gmail, Drive, and Safe Browsing to appropriate scanners. The report frames this as part of broader AI-driven defensive capabilities (including RETVec) that can shift the advantage toward defenders, while also highlighting data protection, regulatory concerns, and research showing potential malicious or persistent backdoor behaviors in large language models.