Quillbot might do a great job at refining your text, but don’t get too excited thinking it’ll outsmart advanced detectors like Winston AI. Sure, it cleans up your grammar and rearranges your sentences but it's not built to hide its robotic fingerprint. So, can Winston AI easily spot Quillbot’s rewrites? The answer is a resounding YES. But please read below to know more about it.
Why Quillbot gets detected by Winston AI?
The simple answer is that just like Wordtune, Quillbot is not made to bypass AI detectors. You can see this on their website as well. They never advertise bypassing AI detectors like Winston AI as a feature on their website or any marketing material that you come across. Hence, if it is not made to accomplish this task it won't be able to do it.
Quillbot is mainly used by academic students to remove their grammatical mistakes, improve fluency, get summaries, etc. It is not at all meant to bypass AI detectors. This is why Winston AI can detect Quillbot pretty easily.
Our Results: Key Points
Here is the raw data for your reference:
| Metric | Result |
|---|---|
| Total passages evaluated | 100 |
| Average Winston AI “human-written” score | 20.6 / 100 |
| Median score | 0.65 |
| Pass rate ≥ 50 (“borderline-human”) | 20 % |
| Pass rate ≥ 75 (comfortably human) | 18 % |
| Pass rate ≥ 90 (very safe) | 17 % |
In total, we evaluated 100 Quillbot outputs across various modes. The average Winston AI “human-written” score was just 20.6 out of 100. The pass-rate metrics clearly show very low success in bypassing Winston AI.
What the numbers say vs. Why it matters
| What the numbers say | Why it matters |
|---|---|
| 76% of all outputs score below 10 % | Winston AI is extremely confident those texts are machine-written. A single Quillbot pass rarely fools it. |
| Outliers, not consistency | Almost every mode’s high scores come from just 1–3 passages. You can’t predict which passage will “pop” without re-running detector checks. |
| High variance within modes | The 10–25 pp standard deviations tell you results bounce around – more noise than signal when you flip between Creative, Standard, Formal, etc. |
| Pass-rate ≥ 90% tops out at 45% (Simple, Humanize) | Even the best modes still fail more than half the time to look “very safe.” |
We found that 76% of all Quillbot outputs generated extremely low (<10%) “human-written” scores on Winston AI. The outliers that actually scored high (≥ 90%) were super rare. It’s basically a game of chance that you might get a “borderline-human” piece of text, you can’t rely on it consistently.
Detailed Mode Analysis
Below is a table that shows how different Quillbot modes scored on Winston AI. We tested each mode multiple times:
| Mode | Average Score | Median Score | Pass Rate ≥ 50 % | Samples |
|---|---|---|---|---|
| Simple | 49.49 | 40.43 | 45.5 % | 11 |
| Humanize | 37.16 | 0.95 | 36.4 % | 11 |
| Shorten | 24.46 | 0.65 | 27.3 % | 11 |
| Expand | 23.52 | 1.16 | 25.0 % | 12 |
| Creative | 24.96 | 0.84 | 20.0 % | 10 |
| Formal | 16.83 | 0.56 | 18.2 % | 11 |
| Standard | 8.71 | 0.44 | 8.3 % | 12 |
| Academic | 0.51 | 0.56 | 0.0 % | 11 |
| Fluency | 0.96 | 0.62 | 0.0 % | 11 |
As you can see, modes like Simple and Humanize did the best in pushing up Winston AI’s “human-written” score. However, their pass-rate (≥ 90%) is still well below 50%, so it’s not reliably going to make your text look very safe. The Academic or Fluency modes basically do nothing to fool Winston AI, with near-zero success in passing key thresholds.
Which rewriter is made to do this task?
There are many rewriters that are made specifically to bypass AI detectors such as Deceptioner, Undetectable.ai, and others. These tools are purpose-built and tuned in such a way that they will be more reliable when it comes to bypassing AI detectors. You can read our guide on bypassing Winston AI.
Quillbot, on the other hand, might occasionally achieve high scores, but it won’t be consistent at all. This means you have to generate multiple times, re-check with Winston AI, and cherry-pick from 1–2 good outputs. It gets annoying very soon.
Why is it easy for Winston AI to detect Quillbot?
Winston AI has a sophisticated algorithm which probably not only includes large language models but also uses statistical analysis to find patterns in your text that point to AI. Quillbot is surely using some kind of large language model to rewrite your work and it doesn't factor in bypassing AI detectors, so it is bound to get detected.
LLMs (AI) generally write with fewer grammar mistakes, overuse certain rhetorical structures, and often exhibit low perplexity and burstiness scores. This is enough to trigger Winston AI because it can detect text generated by an AI quite confidently.
Frequently Asked Questions
Q1. Does Winston AI detect Quillbot?
Yes, Winston AI will easily detect Quillbot. You may pass a plagiarism test but it is extremely unlikely that you would pass Winston AI with Quillbot alone.
Q2. Is using Quillbot plagiarism?
No, the mere act of using Quillbot to rewrite is not plagiarism because you might be rewriting text that you originally wrote yourself. However, it will likely trigger Winston AI’s detection algorithms if you are trying to pass it off as fully human.
Q3. Is Quillbot free to use?
Quillbot does have a limited free plan with some paraphrasing modes and word limits, but it might not be enough for most people. You probably have to upgrade for more advanced rewriting.
Q4. Can Winston AI detect ChatGPT?
Yes, Winston AI can easily detect ChatGPT outputs, especially if you don’t further edit them or use specialized humanizer techniques. ChatGPT has a typical writing style that Winston AI is well-trained on.
Q5. Which Quillbot mode is best for bypassing Winston AI?
Simple mode or Humanize might give you the highest chance, as shown in the table, but it is still not consistently reliable. You can’t just rely on one or two passes.
The Bottom Line
Winston AI is good at detecting Quillbot. One more thing I would like to add is that Quillbot is simply not designed to evade AI detectors. If you want to ensure your text is safe from Winston AI (or any other detector), you may need to manually rewrite or use a specialized AI text humanizer.
So the final verdict: Quillbot is not a reliable AI bypasser at all. Even the best modes fail more than half of the time to look very safe. Save yourself the trouble and look for a solution that addresses Winston AI detection head-on.
