If GPTZero's free plan of 10,000 words a month is too small for your thesis, PaperCheck gives 5 free checks a month of up to 20,000 words each, from a Word or PDF file, with sentence-level results and a plagiarism check in the same report.
Written by Adithyan, a student who builds PaperCheck. Last updated 31 October 2026.
A full thesis or project report is often 10,000 to 20,000 words, which uses up GPTZero's free monthly allowance in one go. Students also want plagiarism and AI results together.
Every detector is trained differently, so PaperCheck and GPTZero will not give the same number. Use the flagged sentences to decide what to rewrite.
PaperCheck allows up to 20,000 words per free check, 5 checks a month.
Yes, Word (.docx) and PDF both work.
Check your paper: 5 free checks a month
PaperCheck is not affiliated with Turnitin, GPTZero, papercheck.in or papercheck.ai. Scores from any detector are estimates, not proof.