GPTZero

[7] GPTZero was developed by Edward Tian, a Princeton University undergraduate student, and launched online in January 2023 in response to concerns about AI-generated usage in academic plagiarism.

[16][15][14] Educational institutions, including Princeton University, have discussed the use of GPTZero to combat AI-generated content in academic settings, with mixed opinions.

",[19] computer scientists Vinu Sankar Sadasivan, Aounon Kumar, Sriram Balasubramanian, Wenxiao Wang, and Soheil Feizi from the University of Maryland demonstrate empirically and theoretically that several AI-text detectors are not reliable in practical scenarios.

[7] News website Ars Technica commented that humans can still write sentences in a highly regular way, leading to false positives.

The writer, Benj Edwards, went on to state that the perplexity score only concerns itself with what is "surprising" for the AI, leading to instances where highly common texts, such as the US Constitution, are labeled as likely AI-generated.