Amazon Web Services introduced Amazon Nova Act, a multimodal foundation model that addresses UX testing challenges by understanding and interacting with web browser interfaces through vision and action. Unlike traditional automation tools requiring hard-coded scripts that break with interface changes, Nova Act navigates websites by processing visual information and analyzing screenshots of web pages. The model examines screenshots to understand page layout, identifies interactive elements through visual cues, and makes contextual decisions about which actions to take next, mimicking human reasoning. Amazon Nova Act’s reasoning and chain of thought logs provide insight into website design and intuitiveness. The solution uses generative AI to enable parallel execution of comprehensive user flow testing at scale, and demonstrates how to build a cloud-deployed UX testing platform that automatically generates test scenarios from documentation, executes user flows at scale, and provides actionable insights through automated analysis. The solution includes a documentation processing layer where Amazon Simple Storage Service stores site documentation, user guides, and flow testing specifications to provide context for the generative AI-powered flow discovery engine.