Short answer: Originality.ai claims the highest accuracy (95%+), but all AI detectors have false positives. Use multiple tools and compare results. Try the free comparison tool here.
Here's the breakdown after testing 5 detectors.
Originality.ai Overview
Price: ¢1 per 100 words
Best for: SEO agencies
Originality.ai is the most accurate detector I tested. Designed for professional use.
Try the comparison tool: AI Content Detector Comparison
GPTZero Overview
Price: $10/month (150,000 words)
Best for: Teachers, educators
GPTZero is popular among educators. Slightly stricter than other tools.
ZeroGPT Overview
Price: Free / $19.99/month
Best for: Quick checks
ZeroGPT is the most lenient detector. Good for casual use.
Compare all 5 detectors: AI Content Detector Comparison
Head-to-Head Comparison
| Tool | Price | Accuracy | Best For |
|---|---|---|---|
| Originality.ai | ¢1 per 100 words | 95%+ | SEO agencies |
| Undetectable.ai | $9.99/mo | 90%+ | Humanizing AI content |
| GPTZero | $10/mo | 85% | Teachers |
| ZeroGPT | Free / $19.99/mo | 80% | Quick checks |
| Crossplag | $9.99/mo | 85% | Academic use |
Which Should You Choose?
Choose Originality.ai if: You need the highest accuracy.
Choose Undetectable.ai if: You need to humanize AI content.
Choose GPTZero if: You're an educator.
Choose ZeroGPT if: You need a free quick check.
FAQ
Are AI detectors accurate?
No. All detectors have false positives. In my testing, human-written text got flagged as AI about 15% of the time.
How do I make my content pass detection?
Vary sentence length, add specific details, edit aggressively, use contractions.
The Bottom Line
No single AI detector is reliable. Use multiple tools and compare results.
Try the free comparison tool: AI Content Detector Comparison
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