AI is increasingly used by threat actors to launch faster and more sophisticated attacks, and how Proofpoint counters this with its Nexus AI platform. Nexus combines multiple AI-driven capabilities, including language models for message intent, relationship graphs for behavioral anomalies, computer vision for image-based threats, machine learning for suspicious patterns, and real-time threat intelligence. The system leverages a large data set and continuously calibrated models to detect and block threats across the full email lifecycle and related collaboration tools. It was emphasized that this approach achieves very high detection effectiveness and is designed to keep organizations ahead of evolving AI-driven attacks.