AI detector
AI Content Detector
Analyze text and identify sections that show patterns associated with AI-generated writing.
- No sign-up needed
- Sentence-level highlights
- Text never used for training
Minimum 80 words. Your text is analyzed securely and never used for AI training.
Privacy-first
Anonymous scans are never stored. Your text is never used to train AI.
Secure processing
Encrypted in transit, isolated per account, keys never exposed to the browser.
Fast analysis
Results in seconds, with sentence-level scoring for every scan.
Transparent scoring
Likelihoods and confidence levels — never an absolute verdict.
Detection built on a specialized model, explained sentence by sentence
Most “AI detectors” give you a single number and nothing else. Centixio pairs a purpose-built classifier with sentence-level scoring, so you can see which parts of a document drive the result — useful when a text mixes human writing with AI-generated passages.
Alongside the likelihood, you'll see writing-pattern metrics — sentence variation, predictability, repetition and vocabulary diversity — that help explain why a passage was flagged.
How it works
Three steps, a few seconds
- 1
Submit your text
Paste content or, on paid plans, upload a PDF or Word document.
- 2
Detection model scores it
A classifier estimates overall AI likelihood; a second model scores each sentence.
- 3
Read the evidence
Highlighted sentences, confidence and writing patterns show where the signal comes from.
Use cases
Who uses it
Mixed documents
Find the specific paragraphs that were likely generated when a document is partly AI-assisted.
Content moderation
Screen batches of user submissions or reviews with batch scanning (Business plan).
Editorial review
Flag passages that need a closer read before publication.
Limitations you should know
- Detection is probabilistic — the model estimates likelihood, it doesn't know who wrote the text.
- New or fine-tuned language models may evade detection until detectors are updated.
- Results are less reliable for non-English text and code.
AI detection systems can produce false positives. Use results as one signal rather than definitive proof, and never as the sole basis for academic, employment or disciplinary decisions.
How we handle your text
- No training. Your text is never used to train AI models — ours or anyone else's.
- Anonymous = not stored. Scans without an account are analyzed and discarded.
- Private history. Signed-in scans are visible only to you, and can be disabled or deleted.
- Never public. Scans and reports are never indexed or shared.
FAQ
Frequently asked questions
Which AI models can it detect?
The detection model is trained to recognize patterns common to modern large language models, including GPT-family models (ChatGPT), Claude, Gemini and Llama. Detection quality varies by model and by how much the text was edited.
Why score each sentence separately?
Many real documents are mixed: a human outline with AI-written paragraphs, or AI drafts edited by a person. Sentence scores show where the signal is concentrated instead of averaging it away.
Does the AI detector use ChatGPT to decide?
No. Asking a chatbot whether text is AI-written is unreliable. We use a specialized detection model; a language model is only used on paid plans to summarize the results in plain English.