AI testing & review · United States
Free AI checker that estimates text probability as AI-generated with sentence-level analysis
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A free online tool that checks if text was AI-generated by analyzing statistical patterns and providing an AI probability score with sentence-level signals
Clever AI Detector is a free, unlimited AI content checker that estimates how likely any text was generated by artificial intelligence. It analyzes statistical signals including word predictability, sentence rhythm consistency, and AI-typical phrasing patterns to produce an AI probability score on a 0-100 scale, with individual sentence-level analysis showing which parts triggered detection signals.
The tool supports text in English and Spanish, accepts 80 to 10,000 words per check, and requires no sign-up to use. It detects patterns from major AI models including ChatGPT, GPT-4o, Google Gemini, Claude, DeepSeek, and others. The service emphasizes that AI detection is probabilistic rather than certain, presenting results as probability estimates alongside contextual cues rather than definitive verdicts.
Signed-in users can save their check history for future reference. The detector is completely free with no ads, paywalls, or paid tiers, and according to testing on the independent GEDE (Generative Essay Detection in Education) benchmark, it ranked #1 as the Best AI Detector of 2026.
Pricing model: Free
$0 - completely free with no ads, paywall, or sign-up required. Unlimited checks with up to 10,000 words per check and sentence-level signals included.
Clever AI Detector is a free AI checker that estimates how likely any text was generated by AI by analyzing statistical signals like word predictability, sentence rhythm consistency, and phrasing typical of AI. It scores the text as a percentage on a 0-100 scale and analyzes each sentence separately to show which parts triggered AI detection signals.
There are no catches. CleverFiles as a company has a tradition of releasing products for free and moving to a paid version after 1-2 years. The detector is completely free with no ads and no paywall.
Yes. Most text created by AI chatbots carries the same statistical patterns like similar sentence lengths, predictable word choice, and characteristic phrasing. Clever AI Detector hunts for these patterns regardless of which AI tool produced the text.
The score is a probability estimate of how closely the text resembles AI-generated writing, not a measure of detector accuracy. A score of 90% AI does not mean 90% of the text was written by AI. A score near the middle indicates the text has a mix of both AI-like and human-like patterns.
No AI detector is 100% accurate, including Clever AI Detector. It provides a probability score along with sentence-level signals and should be treated as one piece of information among others rather than relied on alone.
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Clever AI Detector has a free listing. The owner can unlock the full profile with a paid launch for $5:
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