AI Checker: Detect AI-Generated Text Sentence by Sentence
Our AI checker analyzes every sentence for AI-typical phrasing. It does not identify the author or the model used. Results are delivered by email in about 15 minutes from $0.29/page.
This multifaceted approach enables a comprehensive understanding of the topic.
Illustrative example, not an actual report. A score is not the probability that AI wrote a passage.
How Our AI Checker Works
Upload Your Document
Upload your paper as PDF, DOCX, DOC, or TXT. We extract the text and analyze the full content, handling documents from short essays to full dissertations.
Sentence-by-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.
Receive AI Detection Report
Your report arrives by email in about 15 minutes. Sentence-level AI typicality scores run from 0 to 100, with 50 neutral. They are not probabilities that AI wrote the text.
What Can the Checker Say About AI Models?
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 not published model-specific validation for this service.
ChatGPT
ChatGPT output may contain AI-typical phrasing. The score does not identify an OpenAI model or version.
Google Gemini
Gemini output may contain AI-typical phrasing. Detection is not guaranteed for a particular version.
Claude (Anthropic)
Claude output may contain AI-typical phrasing. No model-specific accuracy guarantee is provided.
Llama (Meta)
Llama is an example of an AI model family. A score does not establish that Llama wrote a passage.
Mistral
Mistral is an example of an AI model family. A score does not establish that Mistral wrote a passage.
Copilot & Bing AI
PlagAware describes AI-typical phrasing associated with generative tools such as Copilot. This is not proof of authorship.
AI Writing Tools
AI writing tools can produce AI-typical phrasing. Editing and prompts can change the result.
Future Models
Detection of a newly released model is not guaranteed. Review the language patterns, not a presumed model identity.
AI Typicality: 0 to 100, 50 Neutral
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.
Lower AI typicality means fewer AI-stereotypical expressions. It does not establish human authorship.
At 50, phrasing is equally typical of natural and AI-generated text. This is a neutral value, not an estimate of how much AI was used.
Higher AI typicality means more AI-stereotypical expressions. Human writing can also score high, so inspect the context.
Illustrative scores, not a real scan: [28] = lower AI typicality, [52] = near neutral, [71] = higher AI typicality. None proves authorship.
What's Included in Your Sentence-Level Report
Sentence-Level Scores
Every sentence receives an AI typicality score from 0 to 100, with 50 neutral. Review passages in context rather than treating the score as proof.
Color-Coded PDF Report
Color highlights show AI typicality, not verified human or AI authorship. Lower values are green, 50 is neutral, and higher values are red.
Results in 15 Minutes
Your AI detection report is generated and emailed to you about 15 minutes after upload and payment. Fast enough to review and revise before an academic deadline.
AI-Typical Phrasing Analysis
The detector evaluates AI-typical phrasing. It does not guarantee detection of every model or version.
Document-Level Summary
Use the sentence-level scores to examine patterns across a longer passage. They summarize style, not an authorship probability.
GDPR-Compliant Processing
Your document is sent to PlagAware in Germany for the scan and is not added to a plagiarism pool.
AI Scan and Combo Pricing
Choose the AI Scan alone, or save 33% with the Combo package that includes full plagiarism checking too.
AI Scan
AI detection sentence by sentence
- Checks every sentence
- AI typicality: 0 to 100, 50 neutral
- Results in 15 minutes
- AI-typical phrasing analysis
Combo: Plagiarism + AI
Best value: both scans together
- Full plagiarism check (70B+ sources)
- AI detection per sentence
- Both checks, one price
- Recommended for theses
Plagiarism Scan
Plagiarism check without AI detection
- 70B+ sources
- Color-coded PDF report
- Source links included
- Results in 15 minutes
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. 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 not published model-specific validation for this service.
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.
No AI detector is fully accurate. 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. If text you wrote yourself is flagged, read our guide on what to do if you are falsely accused of using AI.
PlagAware documents AI-typical expressions in ChatGPT output. A score does not prove that ChatGPT wrote a passage or guarantee detection of every version.
You can upload PDF, DOCX, DOC, or TXT files up to 50 MB. The system extracts the text from your document automatically and runs the full AI analysis on the extracted content. Scanned PDFs (image-only, without selectable text) cannot be processed, please export a text-based version from your word processor.
If your university requires both a plagiarism check and AI detection, the Combo package at $0.39/page gives you both for 33% less than booking separately. For a thesis or dissertation, Combo is strongly recommended. If you only need AI detection (e.g., you've already completed a plagiarism check elsewhere), the standalone AI Scan at $0.29/page is the right choice.
Check Your Paper for AI-Generated Text
Upload your document and receive a sentence-by-sentence AI detection report in 15 minutes. Starting at just $0.29/page, with no registration required.
No registration · Results in 15 min · GDPR compliant