[HOT] Can Turnitin Detect Quillbot Humanizer?

The short answer is yes, it does. The longer answer? The devil lies in the details, and that’s what we’ll uncover in this blog. Keep reading to know more about it.

Why QuillBot Humanizer Gets Detected By Turnitin?

QuillBot’s Humanizer, much like other paraphrasing tools, isn’t specifically made to bypass AI detectors like Turnitin. If you check their website, you won’t see them advertise themselves as an AI bypass tool. This translates to not being able to effectively fool Turnitin’s AI detection models.

As an AI bypasser (or humanizer), QuillBot’s Humanizer is not highly reliable. In one dataset of 100 texts which were rewritten by QuillBot’s Humanizer, only 18 of them came back as completely “human-written” (i.e., 0% AI) on Turnitin. This is a low success rate of 18% (with a 95% confidence interval of 11.7%–26.7%). In simpler terms, if you randomly pick 100 rewrites, only around 18 are expected to pass off as truly human. That means the vast majority, 82 out of 100, gets flagged as AI by Turnitin—often with a very high AI score.

Even if you allow small residual percentages (like letting a text have 1%, 5%, or even 10% AI probability), the overall success rate doesn’t improve much. It barely moves up to about 20% or 21%. A lot of these rewrites end up with a high Turnitin AI score, with the average (mean) being 70% and a median of 99%. This is super high, meaning most rewrites from QuillBot’s Humanizer get flagged with high confidence.

Also Read: Can Turnitin Detect Quillbot?

Important Caveats

• This is one dataset (n=100), so we can’t claim this is universal for all topics or text lengths. However, seeing that the median is 99% is quite telling.
• Universities and colleges often set their own policies regarding what AI scores are acceptable—but if Turnitin flags your submission nearly 99% of the time, that’s obviously a huge risk.
• Detection tools evolve over time and so do paraphrasers. Something that doesn’t work today might get better in the future, but based on the data right now, QuillBot Humanizer is not dependable for AI bypassing.

Also Read: Can AI Detectors Detect Quillbot?

Statistical Terms Made Simple

• Mean 70% Turnitin AI score: That means if you add up all the scores (like 0% for one text, 99% for another, etc.) and divide by 100, you get 70%. So on average, texts were flagged at a 70% AI probability.
• Median 99%: If you line all scores from lowest to highest, the middle one stands at 99%. This suggests that at least half or more texts are flagged at 99% AI.
• Confidence Interval (95% CI: 11.7%–26.7%): It is a fancy way of saying we are quite sure (95% sure, actually) that the success rate of 18% is somewhere between about 12% and 27%.

Which Rewriter Can Do This Task?

Many rewriters you see out there are not built to bypass AI detectors. If you specifically want a tool that does a better job at it, check out dedicated AI text humanizers like Deceptioner or Stealthwriter.ai, or you can test out other specialized tools that advertise bypassing Turnitin as a feature. They employ varied techniques that might have a better chance in beating AI detection since that’s their explicit purpose.

The Bottom Line

QuillBot’s Humanizer is amazing if you just want basic rewriting abilities, grammar correction, or better fluency. However, it is not suitable if your only goal is to bypass Turnitin’s AI detection. You need either a fully human approach to writing or a dedicated paraphraser that focuses only on that specific job. It’s also worth noting that Turnitin’s AI detection is not perfect; it can produce false positives, but with QuillBot’s Humanizer, the risk is still very high according to the data.

My personal opinion is that if you are trying to bypass AI detection, you need to weigh your risks carefully. A near-80% chance of getting flagged is probably not something you want to gamble with unless you have some major backup plan. If you’re serious about beating Turnitin’s AI flags, manual rewriting or a specialized tool is the better option.