AI Content Detector — 4 Models, One Check

Unlike single-model detectors, AICheckHub runs RoBERTa, Sapling, Gemini, and our internal classifier in parallel. You see every score, not just an average. Free for 3 checks a day — no signup.

⚠ No detector is 100% accurate. We run 4 in parallel and show you which agree. How detection works →

Why 4 models instead of 1?

Each AI detection model was trained on different data with different architectures. A text that fools one model often doesn't fool all four. When all four agree, confidence is high. When they diverge — we show you the divergence score so you can decide how much weight to give the result.

Independent benchmarks put leading AI detectors at 76–88% accuracy. Running 4 in parallel and showing disagreement is our way of being honest about uncertainty.

How AI detection works →

Detector FAQ

Which models does AICheckHub use?

RoBERTa OpenAI (via Cloudflare Workers AI), Sapling AI, Gemini text classification, and our internal classifier trained on a curated corpus. We don't use GPTZero, ZeroGPT, or Originality.ai APIs.

What languages are supported?

English and Spanish on Free. English, Spanish, French, German, Chinese (Simplified), Japanese, and Russian on Pro.

Is there a word limit?

1,000 words on Free. 5,000 words on Pro and Lifetime.

Can I use this for academic integrity checks?

You can check your own writing before submission. We explicitly do not guarantee results for academic adjudication — AI detection is probabilistic. Know your institution's policies.

Need sentence-level highlights and the humanizer? Upgrade to Pro.

See pricing →