Detect AI Content in Essays, Theses & Research Papers
Whether you have written a short essay or a doctoral dissertation, the most reliable way to detect AI content is with a sentence-by-sentence tool that identifies ChatGPT, Claude, Gemini and other AI-generated passages precisely. Results in 15 minutes · from $0.29/page.
What Types of AI Content Appear in Academic Papers?
AI content in academic submissions takes several forms, ranging from fully generated sections to AI-drafted paragraphs that were lightly edited. Knowing how to detect AI content in each form is the first step to ensuring your submission is fully original.
Fully AI-Generated Sections
Entire introductions, literature reviews, conclusions or discussion sections generated by prompting ChatGPT or another LLM. When you detect AI content of this kind, the scores are consistently high across every sentence in that section.
AI-Drafted, Human-Edited Text
AI output that was used as a starting point and then lightly revised. It is still possible to detect AI content in these passages because characteristic statistical patterns survive minor editing, leaving scores above the human baseline.
Interspersed AI Sentences
Individual sentences or short passages where the student used AI to complete a thought or draft a transition. The sentence-level approach can detect AI content of this kind even when most of the surrounding text is human-written.
How AI Content Detection Works for Academic Papers
Upload Your Academic Paper
Submit your document as .docx, .pdf, .txt, .odt or .rtf. Maximum 50 MB or 999 pages — suitable for everything from a 5-page essay to a 400-page doctoral thesis.
Sentence-by-Sentence AI Analysis
PlagAware analyses every sentence for perplexity, burstiness and token probability. This is how we detect AI content regardless of which model produced it — ChatGPT, Claude, Gemini or any other LLM.
Section-Level Report Delivered
Your colour-coded PDF report arrives within 15 minutes. Because we detect AI content at the sentence level, flagged passages are highlighted with their score (25–75) so you can see exactly which sections need revision before submission.
Which AI Tools Are Detected in Academic Papers?
Students use a range of AI tools for academic writing assistance. Our service can detect AI content from all major platforms because they all share the same fundamental statistical characteristics that the detector measures.
- ChatGPT (GPT-3.5, GPT-4, GPT-4o) — by far the most used
- Claude (Anthropic) — popular for long-form academic writing
- Google Gemini — research assistance and essay drafting
- Llama, Mistral — open-source models in writing tools
- New models added continuously as they emerge
AI content detected by section
Flagged: Introduction and Conclusion contain high AI content. Methods and Results appear human-written.
The AI Content Detection Score: 25 to 75
A numeric score for every sentence makes it possible to locate AI content precisely within a long academic document.
Score 25–35: Human Content
Strongly indicative of original human writing. Unpredictable vocabulary, natural sentence variation, personal voice. When you detect AI content and scores fall here, the passage is considered authentically human — the target range for all academic submissions.
Score 40–55: Ambiguous Content
May be highly formal academic prose, AI-assisted writing, or non-native English. Review context. Technical sections (methods, data tables) may score in this range naturally.
Score 65–75: AI Content Detected
Strong AI generation signals. These are the sentences where we detect AI content most clearly — they are highlighted in the report and should be revised before submission to restore genuine original writing.
Detect AI Content in Your Academic Paper
Pay per page. No subscription. Minimum order $0.90.
Plagiarism Scan
Source plagiarism check only
- 70+ billion sources
- Results in 15 minutes
- PDF report with source links
- PlagAware powered
Combo: Plagiarism + AI
Complete academic integrity check
- Full plagiarism check
- AI content detection
- ChatGPT, Claude, Gemini & more
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AI Scan
AI content detection only
- All major AI models covered
- Score 25–75 per sentence
- Results in 15 minutes
- PDF report by email
Detect AI Content — Frequently Asked Questions
The tool can detect AI content generated by any major large language model: ChatGPT (GPT-3.5, GPT-4), Claude (Anthropic), Gemini (Google), Llama (Meta), Mistral and others. It covers fully AI-generated text as well as passages where AI was used to draft or substantially rewrite sections. Lightly AI-edited text may score in the ambiguous range.
Yes. The sentence-by-sentence approach is well-suited to long documents like theses because it can detect AI content in specific chapters or sections, rather than just providing a single score for the whole document. A 60,000-word dissertation can be processed and analysed accurately.
Yes. Because the tool can detect AI content at the sentence level, it naturally exposes AI-heavy sections as well. An AI-generated abstract, introduction or conclusion will show as concentrated high scores in those sections, even if the rest of the paper is human-written.
No special preparation is needed. Simply upload your document as .docx, .pdf or .txt. The scanner processes the full text including all sections. You do not need to remove references, footnotes or bibliography sections — the tool analyses only the main text.
To detect AI content in an essay, look for low perplexity (every word choice is statistically predictable), low burstiness (sentences are similar in length and complexity), perfect grammar, comprehensive but generic vocabulary, and characteristic AI phrases like "it is important to note", "in conclusion", and "furthermore". Our detector measures these statistical properties for every sentence automatically.
Detect AI Content in Your Essay or Thesis Before Submission
From short essays to doctoral dissertations — upload your paper and get a section-level AI content report in 15 minutes.
Use code plagiarism-scan10 for 10% off.