Chatgpt's open source project is called GPT-2 (Generic Pre trained Transformer-2). GPT-2 is a natural language processing model developed by OpenAI based on the Transformer model architecture, which performs well in text generation and dialogue tasks. OpenAI released the open source code of GPT-2 in 2019, enabling researchers and developers to use this powerful model in their own projects. The open source project of GPT-2 can be found on GitHub, which contains the source code, training data, pre training model and other related resources of GPT-2. Through this open source project, users can use GPT-2 for text generation, dialogue generation and other natural language processing tasks, and customize and improve according to their own needs.