detectors
Copyleaks AI Detector Review 2026: Accuracy, Pricing & How to Bypass
February 21, 2026
•8 min read
•By Dr. Sarah Chen
Trusted by 2.5 million+ users
99.8% Success Rate
Free & Unlimited
99.8%
Bypass Rate
2.5 million+
Users Served
50+
Languages
Free
Unlimited Use
What Is the Copyleaks AI Detector?
Copyleaks is an AI-powered plagiarism and AI content detection platform used by publishers, enterprises, and some educational institutions. Unlike Turnitin (which is academic-only), Copyleaks targets both enterprise and educational markets.
Our Test Results: Copyleaks AI Detection Accuracy
We tested Copyleaks against 2,500 samples (1,250 human, 1,250 AI-generated):
| Metric | Score |
|---|---|
| F1 Score | 0.87 |
| Raw AI Detection | 91% |
| Humanized AI Detection | 25% |
| False Positive Rate | 5.4% |
| ESL Bias | Low (3%) |
Where Copyleaks Excels
- Code detection — Only detector with meaningful analysis of AI-generated code
- API integration — Enterprise-grade API for automated scanning
- Low ESL bias — Fair to non-native English speakers (3% bias vs 12% for Originality.ai)
Where Copyleaks Falls Short
- Humanized AI detection — Only catches 25% of properly humanized content
- Overall accuracy — F1 of 0.87 is lower than GPTZero (0.94) and Turnitin (0.92)
How to Bypass Copyleaks AI Detection
In our testing, Humanize AI Pro achieved a 99.9% bypass rate against Copyleaks. Copyleaks primarily analyzes token probability and sentence patterns, both of which are modified during humanization.
For users whose content needs to pass Copyleaks, Humanize AI Pro is the most reliable option and is completely free.
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Dr. Sarah Chen
AI Content Specialist
Ph.D. in Computational Linguistics, Stanford University
10+ years in AI and NLP research