ChatGPT and academic work: what an AI detector shows
AI has become a common writing tool, and many universities now also check work for AI-generated text. Students and teachers alike need to know what an AI detector's result means — and what it doesn't.
How the detector works
Text written by language models is statistically "expected": even word choice, uniform sentence length, a smooth style. PlagiatX combines several models and gives a probability for every sentence; sentences likely written by AI are highlighted in yellow.
The result is a probability, not a verdict
No AI detector is 100% accurate. Human text written in a formal, formulaic style (for example, restating regulations) can sometimes score high too. The result therefore points to suspicious sentences; the final judgement is made by a person who reads the text.
Using AI honestly
- First learn your university's and supervisor's rules on AI — they differ.
- Use AI as a helper for ideas, outlines and editing; the content, analysis and conclusions should be yours.
- Verify every fact and source AI gives you against the original: language models can "invent" sources that don't exist.
- Where allowed, state openly how you used AI.
Questions
I wrote it myself but it shows AI. What should I do?
Review the flagged sentences: they are often very generic, formulaic phrases. Rewrite them more specifically with your own examples and data. If you believe the result is wrong, report it with the "Result wrong?" button.
Is the AI check charged separately?
No. Every PlagiatX check includes both plagiarism and AI assessment.
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- How to spot a hijacked journal — What a hijacked journal is, how to recognise its website and how to check a journal against Scopus, DOAJ and the OAK list before submitting.
- Checking coursework and essays for plagiarism — How to check coursework, essays and independent assignments before submitting: which file, how to read the result, what to fix and the QR certificate.
- What plagiarism percentage is acceptable? — There is no single universal figure: the threshold is set by the university, department or academic council. Where to find it and how to read the result.
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- How to format quotations and references correctly — Direct quotes, paraphrase and the reference list: how to format sources so your work isn't plagiarism — with examples.
- How to lower your plagiarism score honestly: 7 steps — High plagiarism score? How to read the result, format quotations and rework the text honestly — step by step.
- How to verify a plagiarism certificate — For supervisors and departments: verify a PlagiatX PDF certificate's result in a minute using its QR code and number.
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