Last updated 10-08-2026
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AI Detector
AI Detector at aidetector.com is a free-first AI content checker for pasted text, uploaded documents, or URLs. You get a color-coded, sentence-level heatmap that labels ChatGPT, GPT-5.4, Claude, Gemini, and similar model output in a few seconds per scan.
The product is built around consensus, not a lone score. Its built-in model is free, and you can optionally spend credits to run Originality.ai, Winston AI, and GPTZero on the same passage, then read the per-detector split when they disagree. That mirrors Arizona State University research cited on the site showing multi-detector agreement drives false positives toward zero.
Teachers, students, writers, and marketing teams each get tailored pitch blocks on the homepage, with bulk scanning for classrooms, API access for content shops, and compliance-style PDF exports when you need paperwork.
Built-in AI detector stays free while optional engines bill credits per 100 words
Paste, upload docs, or analyze a URL from one dashboard
5,000-word input cap shown on the main scanner
Sentence heatmap with exportable PDF reports for compliance folders
Four-detector consensus view when you enable Originality.ai, Winston AI, and GPTZero together
The built-in scanner is free while premium engines stay optional credit add-ons.
Consensus mode surfaces disagreements between four detectors instead of hiding them in one score.
Supports URL and document analysis alongside pasted text.
Exports PDF reports for audit trails.
Credit costs for third-party detectors are not listed in USD on the public pricing section we could scrape.
5,000-word cap per run on the main interface may require splitting very long manuscripts.
Heavy reliance on optional paid engines for classroom-grade certainty.
Is AI Detector free to use?
Yes. AI Detector includes a free built-in AI detection model with no extra charge, and the homepage advertises free scans with no credit card required. Paid credits apply only when you turn on third-party detectors or add-ons like plagiarism, spell check, or fact check.
How do AI Detector credits work?
AI Detector spends credits based on which engines you enable and how many words you scan. Originality.ai, Winston AI, and GPTZero each cost 2 credits per 100 words, while plagiarism, spell check, and fact check cost 1 credit per 100 words according to the pricing table on aidetector.com.
Which AI models can AI Detector flag?
AI Detector targets text from ChatGPT, GPT-5.4, Claude, Gemini, and other popular large language models named on its homepage hero copy.
Does AI Detector show sentence-level results?
Yes. AI Detector highlights individual sentences with color-coded AI probability scores and an overall percentage, plus downloadable PDF reports for documentation.
Can teachers use AI Detector for classroom work?
Yes. AI Detector markets educator workflows with bulk document scanning, class management tools, and student history tracking, and claims more than 50,000 educators on the site.
Does AI Detector offer an API?
Yes. AI Detector lists API integration, batch processing, and SEO impact analysis in its content-writer persona section on the homepage.
How do I contact AI Detector support?
AI Detector routes support questions through its contact form at aidetector.com/contact, which states that replies usually arrive within one to two business days.