Learn how to build a ChatGPT-like chatbot using Langchain, OpenAI GPT-3, and OpenAI embeddings in this 15-minute tutorial. Develop a Streamlit user interface with a file uploader that allows users to search and ask questions about uploaded documents. Explore key concepts such as prompt engineering, integrating the Wikipedia API, handling Unicode encoding errors, and implementing a callback for token count. Follow along with the step-by-step code review and see the final demo in action. Gain practical experience in creating an AI-powered document search and question-answering system.