Can You Detect GPT-4o Text?
Yes. GPT-4o (and GPT-4o mini) is OpenAI’s most accessible model — it powers the free tier of ChatGPT, making it the most widely used AI writing tool in the world. This also means our detector has extensive training data for GPT-4o patterns.
GPT-4o’s Writing Patterns
GPT-4o is more conversational than GPT-4 but still shows:
- Even sentence pacing — less variation than human writers
- Polite hedging — “That’s a great question,” “There are several perspectives”
- Structured responses — numbered lists, clear topic sentences
- Vocabulary consistency — same register throughout (no sudden shifts from formal to casual)
Detection Accuracy
- GPT-4o: 83-90% on unedited text
- GPT-4o mini: 88-93% (simpler model = more obvious patterns)
Quick Check
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FAQ
Is GPT-4o mini easier to detect?
Yes. GPT-4o mini is a smaller, faster model with more repetitive patterns. Detection rates are higher than full GPT-4o.
Most ChatGPT users are on GPT-4o — is your detector trained for it?
Yes. GPT-4o is the default model for most ChatGPT interactions, which means it represents the largest share of our training data.
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
Detect GPT-4o text now → Free AI Detector