GPTDetector
Detect AI-generated content and get actionable insights
GPTDetector launched on October 3, 2025 with 7 votes, #2,779 of 8,178 launches that month. The site was still online in September 2026, 1 year on.
What it does
Paste text. Get an overall score plus a sentence-by-sentence heatmap that shows which lines look AI-generated and why. Then use the built-in suggestions to humanize them. Works for essays, blogs, emails, and docs.
Detect AI-generated text with GPTDetector, the reliable AI checker trusted by students, teachers, and professionals. Get instant results with sentence-by-sentence analysis, humanization tips, and up to 5000 free words daily.
Our engine analyzes distinctive writing patterns across major AI systems including OpenAI, Claude, Gemini, and Perplexity to provide model-specific likelihood scores. See not just if text is AI-generated, but which AI style it most resembles. Advanced algorithms identify telltale AI writing patterns like repetitive structures, overly formal language, and characteristic phrase patterns that distinguish machine-generated content from human writing. Get detailed confidence scores showing the probability of AI generation, with separate scores for different AI models to help you understand exactly how your content is being evaluated. Deep analysis of sentence structure, vocabulary choices, and…from gptdetector.net
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