The GPT-2 Output Detector is a tool that can quickly identify whether text was written by a human or a bot. It is simple to use, as users just need to input text and the tool will give an assessment of its likelihood of being written by a human. The GPT-2 Output Detector is currently the best model to classify ChatGPT text.

The model was obtained by fine-tuning a RoBERTa model with the outputs of the 1.5B-parameter GPT-2 model.