AI model validation is a critical step in the development of artificial intelligence systems, ensuring that they deliver reliable results when it matters most. It involves evaluating an AI model's performance, reliability, and behavior against established requirements to ensure it solves the intended problem correctly. The process includes defining validation objectives and success criteria, preparing and validating datasets, selecting appropriate validation metrics, designing validation experiments, implementing validation protocols for non-deterministic models, analyzing results and making data-driven decisions, overcoming common challenges, and establishing continuous validation and monitoring. A comprehensive AI model validation strategy requires significant resources and expertise but can provide substantial value with the right tools, such as Galileo's platform, which tackles the toughest AI model validation challenges.