What Is an AI Checker?
An AI checker is a tool that analyzes text and determines whether it was written by a human or generated by an AI model such as ChatGPT, Claude, Gemini, or Copilot.
Whether you’re a teacher reviewing student submissions, an editor verifying content authenticity, or a publisher maintaining quality standards, an AI checker gives you the confidence to make informed decisions.
Why Use AIDetector.life as Your AI Checker?
- ✅ Free & No Signup — Paste your text and get results instantly
- ✅ Multi-Model Detection — Detects output from ChatGPT, Claude, Gemini, Llama, and more
- ✅ Sentence-Level Highlighting — See exactly which sentences are likely AI-generated
- ✅ Fast & Private — Your text is never stored or shared
How to Use the AI Checker
- Paste your text into the input box on the homepage
- Click “Check” to run the analysis
- Review the results — overall AI probability score + highlighted sentences
- Make your decision based on the detailed breakdown
What Can an AI Checker Detect?
Our AI checker is trained to identify patterns typical of large language models (LLMs):
- Perplexity — AI text tends to be predictable and low-surprise
- Burstiness — Humans vary sentence length; AI text is more uniform
- Repetitive phrasing — AI models often reuse transitional phrases
- Semantic flatness — AI-generated text lacks the subtle nuances of human voice
AI Checker vs. AI Detector — What’s the Difference?
The terms are used interchangeably. An AI checker typically refers to a quick, lightweight scan, while an AI detector may imply a more thorough analysis. At AIDetector.life, we offer both: fast checks for quick verification and deep analysis for detailed reports.
Frequently Asked Questions
Is this AI checker free? Yes. AIDetector.life is completely free to use with no word limits on basic checks.
Which AI models can it detect? It detects text from ChatGPT (GPT-3.5, GPT-4, GPT-4o), Claude (Anthropic), Gemini (Google), Llama, Mistral, and other popular LLMs.
How accurate is the AI checker? Our model achieves over 95% accuracy on standard benchmarks. However, heavily edited or paraphrased AI text may score lower. No AI checker is 100% accurate — always use results as one signal among many.
Can it detect AI text that’s been humanized? It can flag many humanized texts, especially those using basic spinning tools. Advanced humanizers may reduce detection rates.
Is my text stored? No. We do not store, log, or share any text you submit.
Start Checking Now
Ready to find out if a piece of text was written by AI?