We all know Quillbot texts trip Turnitin’s alarm bells pretty quickly. But what about Originality AI? Short answer: YES, Quillbot still gets caught. Longer answer: it’s worth understanding the numbers behind that verdict—because the data tells an even clearer story.
Why Quillbot still shows up on Originality AI’s radar
Like every mainstream paraphraser, Quillbot was built to polish sentences, not to “ghost” AI detectors. Its website never promises to “slip past” anything—it promises cleaner prose. Perfect grammar, tidy synonyms and evenly-paced sentences are precisely the bread-crumb trail that detectors (Originality AI included) know to follow.
Originality AI scores each passage on a 0–100 scale (100 % ≈ human-written). In our fresh test with nearly a hundred ChatGPT passages run through every Quillbot mode, only 14 % squeaked past the 50 % “looks human” line. That means 86 % were still flagged as AI-originated. So yes—Quillbot’s polish is usually just another fingerprint.
Also Read: Can Originality AI detect ChatGPT?
What our data shows – Quillbot vs. Originality AI
We paraphrased the same ChatGPT paragraphs in all nine Quillbot modes, then dropped them into Originality AI. Here’s how the detector fared:
| Metric | Value |
|---|---|
| Detection rate (Recall) | 86 % |
| Bypass rate (False Negative) | 14 % |
| Precision * | 100 % |
| F1 Score | 0.86 |
*Our set contained no genuine human text, so any AI call was by definition correct—hence precision = 1.
- Most-detected modes: Standard, Fluency, Formal, Academic (scores cluster near 0 %)
- Best chance of slipping through: Humanize and Creative (median scores ~50–60 %, occasional 90 %+ outliers)
Is Quillbot a reliable “humanizer” then?
If your goal is a guaranteed pass, the data says no. Eight-plus passages in ten will still light up Originality AI. For high-stakes use (graded essays, journal submissions, client content), a 14 % success rate is playing roulette.
Could you layer Quillbot with heavy manual editing or a dedicated “bypass” rewriter like Deceptioner? The answer is YES. Deceptioner's "Originality.ai" mode will help you bypass it reliably.
Frequently Asked Questions (2025 edition)
Q1. Does Originality AI detect Quillbot?
Yes—about 86 % of the time in our test. The other 14 % weren’t magic; they just happened to tip over the 50 % score line, mostly via Humanize or Creative mode.
Q2. Is using Quillbot plagiarism?
Using Quillbot to tidy your own prose isn’t plagiarism. Passing off Quillbot-spun text from someone else’s work still is—Originality AI will spot the AI fingerprints even if the wording changes.
Q3. How can I avoid AI detection with Quillbot?
You probably can’t with consistency. Combine Quillbot’s “Humanize” mode with genuine human edits, varied sentence length, rhetorical quirks, and factual tweaks. Even then, expect only partial success.
Q4. Do detectors look only at grammar?
No. They measure perplexity, burstiness, repetition loops, uncommon n-gram frequency, and more. “Adding typos” won’t fool them.
Q5. Does Quillbot have its own AI detector?
Yes, Quillbot does have an AI-powered plagiarism checker in some of its plans. But that is separate from its rewriting engine. It’s not there to hide your text from Originality AI or Turnitin or anything else.
The Bottom Line
Quillbot is still a terrific stylistic tool—but not a silver-bullet AI bypasser. Originality AI’s 86 % catch-rate on paraphrased ChatGPT proves that. Use Quillbot for clarity and grammar; rely on human creativity if you truly need undetectable prose.
