GPTZero is a machine learning language model by OpenAI developed to distinguish between human-written and AI-generated content. Unlike its predecessors (Other GPT models), which relied heavily on extensive datasets, GPTZero stands apart with its significantly fewer parameters, making it more computationally efficient and quicker to train.

Remarkably, this model is not trained on any specific data set; instead, it leverages unsupervised learning algorithms to produce text from scratch. This is the #1 AI detector with more than 1 000 000 active users. By utilizing variables such as Burstiness, GPTZero can identify AI involvement with remarkable accuracy. It autonomously develops an understanding of language without external training data or pre-existing models.