This tutorial demonstrates how to build an AI Agent using LangChain, Milvus, and OpenAI. The agent performs Retrieval Augmented Generation (RAG) tasks by retrieving information from a vector database like Milvus. Additionally, the monitoring tool Portkey is used to track token usage, token count, and request latency. The tech stack includes LangChain for orchestration, Milvus as a vector database, Portkey for monitoring, and OpenAI for the Language Learning Model (LLM).