FastGPT is a versatile, open-source AI knowledge base platform that streamlines data processing, model invocation, and retrieval-augmented generation, as well as visual AI workflows, empowering users to create sophisticated large language model applications with ease. Users can develop specialized AI assistants by training models using imported documents or Q&A pairs, accommodating a variety of formats such as Word, PDF, Excel, Markdown, and links from the web. Additionally, the platform automates essential data preprocessing tasks, including text refinement, vectorization, and QA segmentation, which significantly boosts overall efficiency. FastGPT features a user-friendly visual drag-and-drop interface that supports AI workflow orchestration, making it simpler to construct intricate workflows that might incorporate actions like database queries and inventory checks. Furthermore, it provides seamless API integration, allowing users to connect their existing GPT applications with popular platforms such as Discord, Slack, and Telegram, all while using OpenAI-aligned APIs. This comprehensive approach not only enhances user experience but also broadens the potential applications of AI technology in various domains.