AI Text Checker is a free and unlimited AI detection tool that analyzes text to determine if it was generated by AI models like ChatGPT, GPT-5, Gemini, Claude, and LLAMA. With a claimed 97%+ accuracy rate, it provides instant sentence-level analysis and detailed reports. The platform also offers a humanizer feature to bypass AI detection and supports multiple languages. It is used by over 1,000 leading universities and requires no login. The tool prioritizes privacy, claiming that content is never stored. A premium version is available for bulk checking.