RAG-GPT is an intelligent customer service chatbot system that combines RAG technology with LLMs to provide contextually relevant answers from user-customized knowledge bases. It provides a Flask backend, Next.js frontend, and admin console for importing data from websites, URLs, or local files. The system supports multiple LLM providers including OpenAI, ZhipuAI, DeepSeek, Moonshot, and local LLMs via Ollama, with document parsing handled through LlamaParse.