The programming paradigm often used in artificial intelligence (AI) solutions is the functional programming paradigm. This approach emphasizes the use of pure functions and avoids shared state and mutable data, allowing for easier reasoning about program behavior. Functional programming is well-suited for AI tasks such as machine learning and data analysis because it facilitates the handling of large data sets and supports concurrent execution of processes. Languages like Python and Scala commonly incorporate functional programming principles to build AI algorithms and models, enhancing both performance and maintainability.