GPTZero

AI detector made to preserve what's human

★★★★★ (0 reviews) Freemium Academics
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Overview

GPTZero is an AI content detector that identifies text generated by models like ChatGPT, GPT-4, Gemini, and Claude while evaluating writing quality. It adds hallucination detection, plagiarism and grammar checks, writing verification, and integrations for Chrome, Google Docs, and Classroom.

⚡ Academics 💵 Freemium — free 10,000 words/mo; Essential $14.99/mo, Premium $23.99/mo, Professional $45.99/mo (cheaper annually) 📅 Listed 10 Jun 2026

✨ Features

AI Detection

Detects AI-generated text from ChatGPT, GPT-4, Gemini, Claude, and Llama.

Writing Verification

Offers video replay and origin verification to prove human authorship.

Hallucination & Plagiarism

Flags fake citations and checks content for plagiarism.

Integrations

Works via Chrome extension, Google Docs, Canvas, and Google Classroom.

⚖️ Pros & Cons

Pros

✓ Free tier with no account needed
✓ Multiple integrations
✓ Writing-origin verification

Cons

✗ Word limits on paid tiers
✗ AI detection can produce false positives

💰 Pricing

Essential

$15/mo

  • 150,000 words/month scanning
  • AI detection
  • $10/mo billed yearly
  • Basic writing tools
POPULAR

Premium

$24/mo

  • 300,000 words/month scanning
  • Advanced scan
  • Writing feedback
  • Plagiarism check
  • Source/citation generation

Professional

$46/mo

  • 500,000 words/month scanning
  • All Premium features
  • Up to 10 million words overage
  • Priority support

Categories

AcademicsDetector