QuillBot vs AI Humanizer: Can QuillBot Bypass AI Detectors? (2026)

QuillBot Is Not an AI Humanizer

This is the most important thing to understand: QuillBot is a paraphrasing tool, not an AI humanizer. It was designed to rephrase text for clarity — not to bypass AI detectors.

Many people search for "quilbot" hoping it can make ChatGPT text undetectable. It cannot.

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We Tested QuillBot Against Every Major Detector

Tool / Mode	Turnitin	GPTZero	Originality.ai	Copyleaks
Raw ChatGPT	97% AI	98% AI	99% AI	95% AI
QuillBot Standard	68% AI	72% AI	81% AI	70% AI
QuillBot Fluency	71% AI	74% AI	79% AI	68% AI
QuillBot Creative	51% AI	54% AI	67% AI	55% AI
QuillBot Formal	65% AI	69% AI	78% AI	66% AI
Humanize AI Pro	2% AI	3% AI	4% AI	1% AI

Even QuillBot Creative mode still gets flagged over 50% of the time.

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Why QuillBot Cannot Bypass AI Detectors

What QuillBot Does

• Swaps synonyms and restructures sentences
• Changes vocabulary level and formality

What QuillBot Does NOT Do

• Modify text perplexity (statistical predictability)
• Adjust burstiness (sentence complexity variation)
• Address semantic patterns unique to AI text

AI detectors analyze statistical patterns, not specific words. QuillBot changes words but preserves the patterns.

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QuillBot vs AI Humanizer: Feature Comparison

Feature	QuillBot	Humanize AI Pro
Purpose	Paraphrasing	AI detection bypass
Bypass Turnitin	No (51-68% detected)	Yes (99.8% bypass)
Price	$9.95/month	Free
Word limit (free)	125 words	Unlimited
Signup	Required	Not required
Languages	30	50+

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When to Use QuillBot vs an AI Humanizer

Use QuillBot when you need to rephrase your own writing for clarity and are NOT concerned about AI detection.

Use Humanize AI Pro when you need content to pass Turnitin, GPTZero, or any other AI detector. It is free, unlimited, and does what QuillBot was never built to do.