GPTOne

Description

GPTOne checks whether text was likely written by ChatGPT, GPT-5, Claude, Gemini, Grok, DeepSeek, Llama and other models, with a sentence-by-sentence breakdown instead of one opaque percentage, in many languages and up to 50,000 characters per scan. Its AI Image Detector gives an AI-versus-real confidence score, a region heatmap and a C2PA provenance check. Scanning needs a free account with free credits, no card required. Built for teachers, students, editors, recruiters and SEO teams.