Key Pointers
- The Quetext AI Detector spots writing from all LLMs.
- You can scan your first 1000 words for free, no signup needed.
- Five steps to a clean scan: open the tool, paste your text, run the check, read the score, fix what’s flagged.
- Results aren’t just one number. You get a line-by-line breakdown showing which sentences look AI-written.
- If you find AI patterns, the AI Humanizer rewrites them in seconds.
What is the Quetext AI Detector?
The Quetext AI Detector is a free tool that checks whether text was written by a human or generated by an AI model like ChatGPT, Claude and more. The software examines both perplexity (how predictable your use of words is) and burstiness (how varied your use of sentence lengths is), and then assigns a confidence rating indicating how likely it is that the writing was produced by AI. It will highlight the lines of text that look like they were generated by a machine so you will know what you need to change.
Here’s a scenario. You just published an article written by a freelance writer, and forty minutes later one of your editors messages you “Did you run this through ChaptGPT? That sounds odd.” At this point, you have no way of knowing if the article was produced by ChatGPT or not and you’re stuck defending your actions or quietly removing the file.
This is where having a quality AI detection program integrated within your processes makes all the difference. You will be able to conduct a 30 second scan and quickly determine if it was generated by an AI and then know what to do next.
Now, we’ll show you step by step how to correctly use the Quetext AI Detection tool so that there is no guesswork on your end.
Why writers actually run AI checks before publishing
A few real reasons people pull up an AI detector:
- A client said “no AI content” in the brief and you want proof before you invoice.
- You used ChatGPT for a first draft and want to spot any sentences that still sound robotic.
- You’re a teacher with a stack of essays and a hunch that three of them sound suspiciously similar.
- You’re a student who paraphrased something and want to make sure it doesn’t read as machine-written.
- You write fast and clean. An editor still flagged you. You want evidence to push back.
Quetext’s AI Detector covers all of these. It runs free for your first 500 words and works against the major models, GPT-3, GPT-4, GPT-5, Claude, Gemini, Bard, LLaMA and more. The free tier is enough for most quick checks; the Essential and Professional plans kick in when you’re scanning at scale.
What the AI Detector does – and what it doesn’t
Worth being clear here.
What it does:
- Analyzes your text line by line and flags sentences that look AI-generated.
- Gives you a confidence percentage so you know how strong the signal is.
- Identifies specific patterns: passive voice overload, formulaic transitions, predictable rhythm.
- Connects directly to the AI Humanizer if you need to rewrite flagged content.
What it doesn’t do:
- Tell you which exact model wrote the text. It can’t say “this came from Claude” specifically.
- Catch every AI pattern with 100% certainty. No detector can. They’re probabilistic by design.
- Replace your judgment as a writer or editor.
Treat the score as a starting point, not a verdict. You’ll get more out of it that way.
Step 1: Open the AI Detector
Head to the AI Detector page on quetext.com. You don’t need an account to run your first scan. The tool sits right there in your browser, ready to take input.
If you’ve used the Plagiarism Checker before, the layout will feel familiar. Same color scheme, same clean text box, same sub-10-second scan time. Quetext built both tools to feel like one workflow.
Step 2: Paste or upload your text
Two options here.
Paste it in. Copy your text from Google Docs, Word, Notion, wherever it lives. Drop it into the text box. Up to 1000 words is free; longer scans are covered by the Essential or Professional plans (starting at 200,000 words a month on Professional).
Upload a file. Got a .docx or .pdf you want to check? Use the upload option. Quetext supports DOC, DOCX, and PDF directly. If you’re scanning a batch of files – say, 50 student essays – switch to Bulk Scan instead of running them one at a time.
One small thing. Strip out anything you don’t actually want scanned: headers, footers, references, big quote blocks. They can throw off the score because cited material isn’t really yours, AI or otherwise.
Step 3: Run the scan
When you click on the “Check AI” Button, it usually takes around 10 seconds to finish scanning 1000 words (some longer documents may take a little longer than this, generally total time should not exceed 30 seconds).
As it runs, our tool will look at two main things: Perplexity (a measurement of how predictable your choice of words is from moment to moment) and Burstiness (a measurement of how different the lengths of your sentences are). In general, human writing tends to be both unpredictable in nature and bursty in style, whereas AI writing tends to be both even in nature (e.g. same length every time) and smooth in style (e.g. there are no dips in smoothness). Although smoothness may sound like a compliment, it is ultimately the identifier of AI-generated text.
Step 4: Read the score and the line-by-line view
Most people rush through this part of the report. This should not be done.
The first thing that you will see is an overall confidence score (i.e. “62% likely AI generated” or “85% human written”). This score is helpful, but it does not tell you the entire story.
Scroll down further. The tool provides color coded (by sentence) representation of the document. The lines in green or yellow appear to have been written by a human. The lines in red or blue appear to have been written by an AI. You may look at the overall report and see a score in the 30’s or 40’s and think you are in the clear, but then you find out that 3 out of the total number of sentences are flagged and represent the majority of the AI score.
This should be your actionable insight. You do not need to rewrite the entire report, just revise those three sentences.
To illustrate, last month, I took a 1,200-word draft and ran it through the tool. My overall score showed 41% AI. I was ready to ignore it. Once I went line-by-line to investigate, I noticed the intro and the first H2 were flagged heavily due to having been drafted by Claude and only lightly edited. The other 1,000+ words had been drafted entirely by me and flowed cleanly. I rewrote the two sections that had previously been flagged in approximately 15 minutes; and as a result, my total score dropped from 41% to 12%.
Step 5: Clean up the flagged sections
Three ways to fix what’s flagged.
Rewrite manually. Read the sentence, ask “would I actually say this?”, and rephrase. Cut the corporate verbs. Add a contraction. Break a long sentence in half.
Use the AI Humanizer. Paste the flagged passage in, pick a tone (natural, conversational, formal), and let the tool rewrite it. Drop the result back into your draft and re-run the scan to confirm.
Paraphrase with AITutorMe. You get three rephrased versions per sentence. Useful when one specific line is the problem and you want options instead of a full rewrite.
Pro move: pair the AI Detector with the Plagiarism Checker before you publish. AI flag clean, plagiarism scan clean – that’s the green light. If you’re publishing client work or academic work, that two-step check is your insurance policy.
Ready to scan? Try the AI Detector free – paste your text and see.
Three quick scenarios
Various users derive value differently when using the same tool; here are examples of what this looks like in action.
The marketer operates under the premise: Freelancers’ submissions are run through the AI Detector for validation of AI-generated content. A marketer at a SaaS company adheres to a 40% cut-off for returning submissions. They have signed up for the Professional Plan due to the need to scan over 60,000 words a month, and the requirement of including an API integration into their Content Management System (CMS) workflow.
The teacher uploads a set of 28 essays from a class for bulk scanning. Each essay receives verification of authorship as part of the bulk scan validation process. In using the AI Detector, the teacher will not accuse any of the authors solely based on their score; rather, she will utilize the 90%+ AI flagged score as a basis for discussion about how appropriately each student has been informed of authorship.
The student uses ChatGPT for outlining her literature review and uses the AI Detector to verify that her actual prose does not read as if it was generated by a machine prior to submitting it. The student uses the Citation Generator if any sources have been paraphrased from within the literature review.
There are several common errors made by users that affect their results.
When scanning text, users who submit lengthy quotations of another author’s written work will be flagged as AI-generated. All quotation marks must first be stripped from the submission, or the output from the AI Detector scan will be considered “noisy” or inaccurate.
Users assume the top-level number from the AI Detector scan is the only metric representing the amount of AI-generated content; this is not the case. The line-by-line breakdown will provide the most accurate indication of whether any AI-generating content was identified.
A user may have rewritten an entire article that has been flagged as AI-generated; however, the model may have identified the user’s work as being predictable and therefore flagged it. Users are encouraged to trust their instincts and to rescan following a round of major edits.
Users who do not conduct a second scan may introduce additional patterns into their article when making the necessary corrections to all flagged items. Therefore, users are encouraged to conduct two alternating scans of the article and complete both in under ten minutes.
Wrap-up
The AI Detector isn’t there to catch you. It’s there to give you a second pair of eyes before you ship something with your name on it. Five steps. A score. A line-by-line breakdown. Then a clean version of your work, ready to go.
Open the AI Detector now and scan your next draft. Check your text now – it’s free.
Frequently Asked Questions
Is the Quetext AI Detector free?
Yes, the AI Detector is free for your first 500 words per scan, no account needed. If you write longer pieces or scan in volume, the Essential plan covers 100,000 words per month at $14.99, and the Professional plan covers 200,000 words at $29.98. You can also buy the AI Detector on its own for $7.99 per month. Pricing details live on the Quetext pricing page.
- Free tier: 500 words per scan, no signup.
- Essential plan: 100,000 words/month at $14.99.
- AI Detector standalone: $7.99/month.
How accurate is the Quetext AI Detector?
The AI Detector uses perplexity and burstiness analysis along with pattern recognition trained on output from major models. No AI detector hits 100% – they’re probabilistic by nature – but Quetext’s tool gives you a confidence score plus line-by-line flags so you can verify the signal yourself rather than trusting one blind number. Pair it with manual review for the cleanest results.
- Detection works on perplexity, burstiness, and sentence patterns.
- Confidence score plus per-line breakdown.
- Best used as a starting point, not a final verdict.
Can the AI Detector spot ChatGPT and Claude?
Yes. Quetext’s AI Detector is trained to identify content from ChatGPT (GPT-3, GPT-4, GPT-5), Claude, Gemini, Bard, and LLaMA. It can’t tell you which specific model produced the text. No detector can do that reliably. But it will flag the patterns that show up across all of them: predictable rhythm, low burstiness, and overuse of formulaic transitions. That’s almost always enough signal to act on.
- Spots GPT-3, GPT-4, GPT-5, Claude, Gemini, Bard, and LLaMA.
- Can’t identify the exact model used.
- Flags shared AI patterns across major LLMs.
What’s the difference between the AI Detector and the AI Humanizer?
The AI Detector finds AI-written content. The AI Humanizer rewrites AI-written content into something that reads more naturally. Think of them as a two-step workflow: detect the problem with one tool, fix it with the other. Both work standalone, but most writers run them together. Scan first, humanize the flagged sections, then scan again to confirm.
- AI Detector finds AI patterns.
- AI Humanizer rewrites them naturally.
- Use them together for the cleanest results.
Can teachers use Quetext to check student assignments?
Yes, and the Bulk Scan feature is built for it. Upload up to 100 files at once on the Professional plan, get individual reports for each student, and review them from one dashboard. Teachers typically pair the AI Detector with the Plagiarism Checker so a single upload covers both checks at the same time. Scores are starting points for conversations, not automatic accusations.
- Bulk Scan handles up to 100 files per upload.
- Combines AI detection with plagiarism checking.
- Works for individual assignments or full class sets.
Does the AI Detector check plagiarism too?
The AI Detector and the Plagiarism Checker are separate tools, but they’re built to work together. Run your text through the AI Detector to check for synthetic patterns, then through the Plagiarism Checker to scan for matched or paraphrased content from across the web. Most Quetext plans give you access to both, so you can run them back-to-back in under a minute.
- AI detection and plagiarism checking are separate tools.
- Most plans include both.
- Standard workflow runs both before publishing.
