AI Writing Detector: Review Your Academic Draft
The AI writing detector evaluates AI-typical expressions in each sentence. AI typicality runs from 0 to 100, with 50 neutral. It is not proof of authorship. Results in about 15 minutes, from $0.29/page.
Human writing and AI output can share vocabulary, grammar, and sentence structure.
Illustrative example, not an actual report. A score measures phrasing, not the probability of AI authorship.
Why Style Alone Cannot Establish Authorship
Both human writing and AI output can contain the same language patterns. Style alone cannot prove who wrote a passage.
Human-Written Text
- Can contain varied word choices
- Can vary in sentence length and complexity
- May use formal or informal constructions
- Can contain AI-stereotypical expressions
- Specific details do not prove human authorship
AI-Generated Text
- Model settings affect word choices
- Prompts can change sentence length and structure
- May contain grammar errors
- May imitate personal voice or opinion
- Can include examples or invented references
Get a Sentence-Level Report in 3 Steps
Upload Your Document
Submit PDF, DOCX, DOC, or TXT, up to 50 MB. No registration required.
Sentence Analysis
PlagAware evaluates the frequency and relevance of stereotypical AI expressions in each sentence. The result measures AI-typical phrasing, not who wrote the text.
Scored Report Delivered
In about 15 minutes, a PDF arrives in your inbox. Sentence-level AI typicality ranges from 0 to 100, with 50 neutral. Highlights show style patterns for contextual review.
AI Models and Detection Limits
The detector assesses AI-typical phrasing rather than identifying a particular model. Detection is not guaranteed for every model, version, or edited passage.
PCO has no model-specific validation for particular AI model versions.
ChatGPT & GPT-4
ChatGPT output may contain AI-stereotypical expressions. Scores do not identify an OpenAI model or version.
Claude & Gemini
Claude and Gemini output may contain AI-typical phrasing, but detection is not guaranteed for a particular model.
Llama, Mistral & Others
Text from open-weight models can show AI-typical expressions. See our LLM detector for detection limits.
Reading Your Detection Score
PlagAware measures AI typicality from 0 to 100 for each sentence, with 50 neutral. Lower values indicate less AI-typical phrasing; higher values indicate more AI-typical phrasing. The score is not an authorship probability or proof of AI use.
The detector can miss AI-generated text and flag human writing. Model choice, prompts, editing, and subject-specific language can affect the scores. Review passages in context and follow your institution's AI policy.
- Below 50: Less AI-typical phrasing
- 50: Neutral phrasing
- Above 50: More AI-typical phrasing
- Results delivered in 15 minutes
Illustrative scores, not a real scan. Review higher-scoring passages in context; they do not prove AI use.
Simple, Transparent Pricing
Pay per page. No subscription. Minimum order $0.90.
Plagiarism Scan
Source-based plagiarism check
- About 70 billion public sources
- Results in 15 minutes
- PDF with source links
- PlagAware powered
Combo: Plagiarism + AI
Both source matching and AI typicality
- Plagiarism check included
- AI writing detection
- AI-typical phrasing analysis
- Best value per page
AI Scan
AI writing detection only
- AI-typical expression analysis
- Score 0 to 100 per sentence
- Results in 15 minutes
- Email delivery
AI Writing Detector: Frequently Asked Questions
Human writing and AI output can share vocabulary, grammar, and sentence structure. AI-stereotypical expressions are indicators for contextual review, not proof of authorship.
PlagAware evaluates the frequency and relevance of stereotypical AI expressions in each sentence. The result measures AI-typical phrasing, not who wrote the text. PlagAware measures AI typicality from 0 to 100 for each sentence, with 50 neutral. Lower values indicate less AI-typical phrasing; higher values indicate more AI-typical phrasing. The score is not an authorship probability or proof of AI use.
The detector measures AI typicality, not the amount of AI assistance. It cannot reliably classify a passage as AI-assisted, fully generated, or entirely human-written.
PlagAware assesses language patterns rather than matching a source for AI detection. Reports usually arrive in about 15 minutes, but processing time can vary.
Upload PDF, DOCX, DOC, or TXT, up to 50 MB. There is no minimum document length beyond the $0.90 minimum order.
Review Your Draft Before Submission
Upload your paper and get a sentence-level AI writing analysis in about 15 minutes.