GPTZero is the first and leading AI detector that allows you to identify specific content in a document or text that has been generated by a large language model (LLM), such as ChatGPT.

Our API is available for the AI Detector, Plagiarism Checker, Paraphraser, Summarizer, Grammar and Spell Checker, Chatbot & Translator

Nov 28, 2025 · Quillbot's Free AI Detector - Use our AI checker to analyze text and identify content generated from ChatGPT, GPT-5, Gemini, Claude, and other AI platforms.

Our AI Detector is carefully trained to detect most texts generated by popular tools like ChatGPT and Bard. These texts often contain certain phrases, patterns, or awkward wording that indicate they …

Grammarly’s AI Detector is ranked the #1 AI checker. Get instant AI detection for content generated by ChatGPT, Gemini, and more.

Instantly detect AI-generated text from ChatGPT, GPT-4, Claude, Gemini, and other popular models.

Run an AI detector text scan across several providers, compare the AI scores, and see where they agree or clash. You can spot risky sections and avoid editing the whole page because of one …

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Free AI detector & AI checker. Detect ChatGPT, GPT-5, Claude, Gemini and Perplexity with 99.8% accuracy. Unlimited checks, no word limit. Trusted by 3M+ users.

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