The copilot-gpt4-service is a tool that can convert free Chat requests of Github Copilot into ChatGPT requests, enabling users to utilize the more powerful GPT-4 model through Github Copilot. With the interface and Github Copilot's token set, users can interact with the GPT-4 model for programming and knowledge acquisition anywhere and at any time. The project is simple to implement and easy to deploy, helping programmers increase their work efficiency.