Kolosal AI is a tool for training and running large language models (LLMs) on local devices. By streamlining the processes of model training, optimization, and deployment, it enables users to leverage AI technology efficiently on local hardware. The tool supports various hardware platforms, provides fast inference speeds, and offers flexible customization capabilities, making it suitable for a wide range of applications from individual developers to large enterprises. Its open-source nature also allows users to conduct secondary development according to their specific needs.