Is ChatGPT Detectable? The Truth in 2026 (Tested)

If you're a student or writer in 2026, you've likely asked: "Can professors detect if I used ChatGPT?"

The short answer is YES. Educational institutions have adopted powerful AI detectors like Turnitin and GPTZero that can flag AI-generated text with over 95% accuracy.

But is every AI model equally detectable? And does "humanizing" the text actually work? We ran a comprehensive experiment to find out.

The Experiment

We generated 1,000-word essays using the three most popular AI models: 1. GPT-4o (OpenAI) 2. Claude 3.5 Sonnet (Anthropic) 3. Gemini Pro 1.5 (Google)

We then ran these essays through the top 3 AI detectors used by universities: Turnitin, GPTZero, and Originality.ai.

The Shocking Results

The table below shows the AI Detection Score (Probability of AI) for raw, unedited text:

| AI Model | Turnitin Score | GPTZero Score | Originality.ai Score | | :--- | :--- | :--- | :--- | | GPT-4o | 98% (Detected) | 96% (Detected) | 99% (Detected) | | Claude 3.5 | 85% (Detected) | 88% (Detected) | 94% (Detected) | | Gemini Pro | 92% (Detected) | 95% (Detected) | 97% (Detected) |

Conclusion: Using raw AI text is unsafe. Even "advanced" models like Claude 3.5 are easily flagged.

Why Is ChatGPT So Detectable?

AI detectors look for two specific mathematical patterns:

1. Low Perplexity: AI models pick the most statistically probable words. This makes the text "smooth" but predictable. 2. Low Burstiness: AI sentences tend to have uniform length and structure. Humans write with "bursts" of short and long sentences.

How to Make ChatGPT Undetectable

To bypass detection, you must increase both perplexity and burstiness. You have two options:

Option 1: Manual Rewriting (The Hard Way)

Rewrite every sentence structure.

Swap common words for unique synonyms.

Break long sentences into fragments.

Add personal anecdotes.

Time required: 1-2 hours per essay.

Option 2: Use Bypasso (The Smart Way)

Bypasso.com uses a custom retraining layer to rewrite AI text specifically to defeat these detectors.

We ran the same essays through Bypasso:

| AI Model + Bypasso | Turnitin Score | GPTZero Score | Originality.ai Score | | :--- | :--- | :--- | :--- | | GPT-4o + Bypasso | 0% (Human) | 2% (Human) | 1% (Human) | | Claude 3.5 + Bypasso | 3% (Human) | 1% (Human) | 5% (Human) |

Final Verdict

Is ChatGPT detectable? Yes, absolutely. Can you bypass detection? Yes, but only if you use a specialized humanizer like Bypasso.

Don't risk your academic reputation. Always humanize your AI text before submission.

👉 [Check your text for free on Bypasso](/dashboard)