Can You Detect GPT-4 Text?
Yes, though GPT-4 is harder to detect than GPT-3.5. GPT-4 produces more natural, varied text — but it still carries statistical patterns that distinguish it from human writing.
GPT-4 vs GPT-3.5: Detection Differences
| Aspect | GPT-3.5 | GPT-4 |
|---|---|---|
| Sentence variety | Low | Medium |
| Vocabulary range | Narrow | Broader |
| Detection rate | 90-95% | 85-92% |
| Common giveaway | Repetitive transitions | Overly balanced arguments |
GPT-4’s main giveaway is structural perfection — every paragraph is well-formed, every argument has a counterpoint, every list has exactly 3-5 items. Real humans are messier.
How to Detect GPT-4 Specifically
Our word-level heatmap catches GPT-4’s subtle patterns:
- Uniform paragraph lengths
- Overuse of hedging phrases
- Suspiciously balanced pro/con structures
- Consistent formality level throughout
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FAQ
Is GPT-4 undetectable?
No. GPT-4 is harder to detect than GPT-3.5, but “harder” doesn’t mean “impossible.” Long-form GPT-4 text (500+ words) is detected at 85-92% accuracy.
What about GPT-4 Turbo and GPT-4o?
GPT-4o produces slightly more conversational text. Detection rates are comparable to GPT-4: 83-90%.
See Also
- Best AI Detector for Students
- Best AI Detector for Teachers
- GPTZero vs Originality.ai
- How to Detect AI-Generated Writing
- All AI Model Detectors
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