FastChat represents an innovative open-source platform designed for training, serving, and evaluating chat models. Launched to democratize access to advanced chat model development, FastChat combines comprehensive training tools with efficient serving capabilities. The platform's core technology focuses on providing accessible tools for developing and deploying chat models while maintaining high performance standards. What sets FastChat apart is its comprehensive approach to chat model development, from training to deployment and evaluation. The system excels at providing tools for model training, serving, and benchmarking while maintaining efficiency and scalability. Advanced features include distributed training support, efficient model serving, and comprehensive evaluation tools. FastChat's development tools enable researchers and developers to experiment with different model architectures and training approaches. The platform includes extensive documentation and examples for various use cases and implementations. Regular updates enhance development capabilities while maintaining compatibility with latest AI technologies.