Fine tuned RoBERTa  model can detect web pages generated by the GPT-2 model with 95% accuracy.

San Jose State University

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Fine tuning pretrained models to detect text samples from its own model or other similar models .the fine tuned pretrained model doesn’t require further supervised example training.

 - GROVER detector
 - RoBERTa detector


Fine-tuning NLM 

Automatic Detection of Machine Generated Text: A Critical Survey
by Ganesh Jawahar, Muhammad Abdul-Mageed, Laks V.S. Lakshmanan
https://arxiv.org/pdf/2011.01314.pdf

Automatic Detection of Machine Generated Text: A Critical Survey


Reference of Foundations of Large Language Models Course

Linear classifier on top of a GROVER model is GROVER detector.

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