How does an AI code detector work?

AI code detectors analyze structural patterns, variable naming conventions, and entropy in the code. Our engine specialized in identifying fingerprints left by models like GPT-5 and Claude 4.5.

Can AI code detectors be fooled?

While some obfuscation techniques exist, our advanced heuristic engine looks at deep logical structures that are difficult for AI to mimic perfectly compared to human developers.

Is there a free GPT detector for code?

Yes, GPT Code Detector offers a completely free web-based tool to analyze code snippets instantly without any signup.

GPT-5 & Claude 4.5 Ready • 2026 Engine

Best Free AI Code Detector

Identify AI fingerprints from ChatGPT, GPT-5, Claude 4.5 & Gemini with our enterprise-grade gpt detector.

Trusted GPT Detector

Live Analysis Engine

function calculateSum(numbers) {
  // Initialize the sum variable
  let sum = 0;
  
  // Iterate through each number in the array
  for (let i = 0; i < numbers.length; i++) {
    // Add the current number to the sum
    sum += numbers[i];
  }
  
  // Return the final sum
  return sum;
}

JSPythonJavaC++

287 Characters • AI Sample Loaded

👇 Analyze now with GPT Code Detector

Supports: GPT-5 • GPT-4o • Claude 3.5 • Gemini Pro

How Our GPT Detector Works

Pattern Mapping

Our engine maps the source code against known large language model structural templates.

Entropy Check

We analyze the predictability of variable naming and logic flow typical of AI generation.

Fingerprint Result

Get a detailed probability score identifying ChatGPT, Claude, or Human origins.

The Professional's Choice

Built for developers by developers

🎯

Accurate Detection

Validated against millions of human and ai-generated code blocks for 99% precision.

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Privacy Assured

No code storage. No logging. Your algorithms remain your private property.

🌐

Universal Stack

Supports Python, Java, JavaScript, C++, C#, Go, and 20+ other popular languages.

AI Code Detector FAQ

Q. How does the GPT detector identify AI code?

The detector analyzes predictability and consistency. AI like ChatGPT often produces overly clean, structurally repetitive code with verbose comments, which our heuristic engine identifies as fingerprints.

Q. Can it detect the latest GPT-5 code?

Yes, our fingerprints are updated in real-time. We continuously train on outputs from GPT-5, Claude 4.5, and the latest Gemini 2.0 models.

Q. Is this AI detector for code free to use?

Absolutely. Our web-based gpt code detector is free for individual snippets. For large scale enterprise detection, we offer API integrations.

Q. Can GitHub Copilot code be detected?

Our engine is specifically tuned to recognize patterns from AI assistants like GitHub Copilot and Cursor, distinguishing them from manual coding styles.