In the video “AI App of the Week 3 – OpenAI-o1 Investment App (Chain Prompting),” Leon van Zyl demonstrates the development of an investment app using OpenAI’s o1 model and the Cursor platform. The tutorial covers the app’s features, including input for monthly income, expenses, and investment strategies, showcasing how the AI generates tailored investment suggestions. Leon explains the concept of chain prompting, where responses from previous prompts inform subsequent ones, enhancing the app’s functionality. This video serves as a practical guide for developers interested in building AI-driven applications.