Large-scale language models (LLMs) such as GPT-4, Claude, and Gemini have redefined the way we interact with artificial intelligence. However, their true potential depends on mastery of prompt design and the ability to build solutions based on these models. This advanced seminar delves into prompt engineering techniques, model behavior control, and the development of intelligent applications. Through real-world case studies and hands-on experimentation, participants will learn how to optimize results, automate processes, and build advanced solutions with LLMs in business contexts.