AI Text Detector: Spot AI-Written Content in Your Document
Our AI text detector evaluates AI-stereotypical expressions in each sentence. It measures AI typicality, not authorship. Results in about 15 minutes, from $0.29/page.
AI output can contain stereotypical expressions, but these also occur in human writing.
Illustrative example, not an actual report. A score measures phrasing, not the probability of AI authorship.
The Science Behind AI Text Detection
AI-typical expressions can also occur in human writing. The report helps you inspect language patterns, not establish who wrote a passage.
Expression Frequency
PlagAware evaluates how frequently AI-stereotypical expressions occur. This is a language-pattern measure, not an authorship test.
Expression Relevance
The relevance of an expression describes how much more frequently it occurs in AI output than in natural text.
AI Typicality
AI typicality combines the frequency and relevance of stereotypical expressions. Prompts and editing can affect the result.
How to Detect AI Text in 3 Steps
Upload Your Text
Submit PDF, DOCX, DOC, or TXT, up to 50 MB. No account needed. Your document goes to PlagAware for the scan and is not added to a plagiarism pool.
Linguistic Analysis Runs
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
You'll receive a PDF report in about 15 minutes, with sentence-level AI typicality from 0 to 100 and 50 neutral. Highlights show language patterns, not verified AI authorship.
Which AI Models Generate Detectable Text Patterns?
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.
Model settings and prompts affect phrasing. A detector can miss AI output or flag human writing.
- ChatGPT (GPT-3.5, GPT-4, GPT-4o)
- Claude (2, 3 Haiku, Sonnet, Opus)
- Google Gemini (Pro, Ultra)
- Llama 2, Llama 3 (Meta)
- Mistral, Phi, Falcon and others
Illustrative interpretation: AI typicality is a style measure. It does not establish the author or the model used.
The 0 to 100 AI Detection Score Explained
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.
Below 50: Less AI-typical
Lower AI typicality indicates phrasing that is less stereotypical of AI output. It does not prove human authorship.
50: Neutral
50 is the neutral value: the phrasing occurs equally in natural and AI-generated text. It does not estimate AI involvement.
Above 50: More AI-typical
Higher AI typicality indicates more AI-stereotypical phrasing. Human writing can also score high, so review it in context.
Pricing: No Subscription, No Hidden Fees
Pay only for the pages you scan. Minimum order $0.90.
Plagiarism Scan
About 70 billion public sources
- about 70 billion public sources checked
- Results in 15 minutes
- PDF report with source links
- PlagAware technology
Combo: Plagiarism + AI
Both source matching and AI typicality
- Full plagiarism check included
- Sentence-level AI text detection
- AI-typical phrasing analysis
- Best value
AI Scan
AI text detection only
- Linguistic pattern analysis
- Score per sentence (0 to 100)
- AI-typical phrasing analysis
- Results in 15 minutes
AI Text Detector: Frequently Asked Questions
PlagAware evaluates the frequency and relevance of stereotypical AI expressions in each sentence. The result measures AI-typical phrasing, not who wrote the text.
AI typicality is not a guarantee of accuracy for any language. Interpret the report in context and do not treat the score as 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.
The detector accepts PDF, DOCX, DOC, and TXT files up to 50 MB. Export other formats to a supported text-based format before uploading.
AI output can contain stereotypical expressions, but these also occur in human writing. Vocabulary, grammar, and sentence structure alone do not prove AI authorship.
Analyze AI-Typical Phrasing in Your Text
Review AI-typical phrasing in your text. Upload now and get a report in about 15 minutes.