Jul 2 (edited) • SEO Tools & AI Insights
Which AI Detectors Actually Work? We Tested 8 Tools So You Don't Have To!
The Reality Check: 74% of new web pages now contain AI content. But can we spot it?
Ahrefs just tested 8 popular AI detectors on human, AI, and mixed content. Here's what they found:
🏆 THE WINNERS
Ahrefs AI Detector & Copyleaks - 72% accuracy
- Best at catching pure AI content
- Rarely flag human writing as AI
- Can even identify which AI model was used!
🥈 SOLID PERFORMERS
ZeroGPT & Originality.ai - 67% accuracy
- Reliable for most content
- Occasionally confused by mixed human-AI writing
😬 THE STRUGGLERS
Grammarly (33% accuracy) and Writer (22% accuracy)
- Often mistake human writing for AI
- Miss obvious AI content
💡 KEY TAKEAWAYS
✅ Good news: False positives are rare (only 8% of human content flagged)
⚠️ Challenge: ALL tools struggle with human-edited AI content
🎯 Best practice: Use multiple detectors, not just one
The Bottom Line
No AI detector is perfect. They're probabilistic tools, not crystal balls. Use them as part of your content evaluation, not the final word.
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Which AI Detectors Actually Work? We Tested 8 Tools So You Don't Have To!
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