The integration of large language models (LLMs) with up-to-date contextual data is critical for improving accuracy and relevance in AI applications. LangChain provides a robust framework for building sophisticated LLM-based applications, while Tecton's Feature Platform manages the entire feature lifecycle, from engineering to serving, ensuring up-to-date and real-time data integration into AI models. By combining LLMs with current context from well-managed feature pipelines, it's possible to create applications that don't just generate responses, but provide insights that are timely, relevant, and tailored to the current business situation. The approach is versatile, supporting batch, streaming, and real-time data, complex feature transformations, and creating any context needed.