In this AWS re:Invent 2023 session, Siva Raghupathy and Vlad Vlasceanu explore data patterns for generative AI applications. They discuss the critical role of data in differentiating Gen AI experiences, covering three key patterns: context engineering with RAG, fine-tuning foundation models, and building custom models. The presenters delve into architectural considerations, data strategy evolution, and AWS services that support these patterns. They emphasize the importance of data cataloging, governance, and security in Gen AI applications. The session provides valuable insights for developers and architects looking to leverage their organization's data to create powerful, context-aware AI applications using AWS technologies.