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GPTZero AI Writing

from $0/mo

GPTZero (AI Writing): GPTZero is a free AI detector that identifies text from ChatGPT, Gemini, Claude, and more, with 99% accuracy. Pricing: from $0/mo. (data verified August 2026)

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About GPTZero

What is GPTZero?

GPTZero is an AI detection tool that scans text to determine if it was written by an AI model such as ChatGPT, Gemini, Claude, or Llama. It also checks writing quality to help users preserve their authentic voice and avoid plagiarism.

What problem does it solve?

In education and professional settings, it's often unclear whether content was AI-generated. GPTZero provides a reliable way to verify human authorship, detect AI-generated text, and ensure originality. It helps educators teach responsible AI use, and helps professionals maintain credibility.

Who is it for?

GPTZero is designed for educators, students, writers, and organizations that need to verify the authenticity of written content. It's especially useful for teachers who want to integrate AI tools responsibly, but it's also for anyone who needs to check if content was AI-generated.

Real use cases

Teachers can use GPTZero to detect AI-generated essays and provide feedback through AI Tutor. Students can verify their own work. Writers and publishers can check for unintentional AI use. Teams can integrate with Zapier or API for automated scanning.

Key features

  • AI Detection — Detects text from major AI models including ChatGPT, Gemini, Claude, and Llama with 99% accuracy.
  • Advanced Scan — Best-in-class accuracy per independent benchmarking.
  • Writing Verification — Use video replay and verification to prove your authentic voice.
  • Plagiarism Checker — Ensures originality and checks for copied content.
  • AI Tutor — Provides custom AI-powered writing feedback to build responsible habits.
  • Integrations — Works with Chrome, Google Docs, Classroom, Canvas, Zapier, via API.

SaaSpartout Score

7.3 /10
Ease of use 8.0
Features depth 8.5
Value for money 7.0
Support quality 6.5
Integrations 7.5
Scalability 7.0
Documentation 6.0
Onboarding speed 8.0

Editorial score from our review methodology — not user ratings.

GPTZero Pricing

GPTZero pricing: from $0/mo.

Free Plan

Free forever with basic AI detection scan (0/10,000 characters), free Chrome extension, and access to educator webinars.

Professional Plan

For individuals, annual billing at $0/mo (save 45%) — includes advanced scan, writing report, plagiarism checker, and API access. Seats can be purchased for teams.

Enterprise and Team Plans

Custom pricing for organizations. Includes all Professional features for everyone, shared team credits, unified billing, and contact sales for demo.

Try the free version or contact sales to see all options.

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Frequently asked questions

Is GPTZero free?
Yes, GPTZero offers a free plan that lets you scan up to 10,000 characters per scan, with automatic AI detection on Chrome and Google Docs. There are paid plans with more features.
How much does GPTZero cost?
GPTZero starts at $0/mo for the free plan. Paid plans are available with annual billing (save 45%) and team/enterprise options. Exact pricing is available on the pricing page.
What AI models does GPTZero detect?
GPTZero detects text from major AI models including ChatGPT, GPT-4, Gemini, Claude, Llama, and more.
Who is GPTZero best for?
GPTZero is best for educators, students, and organizations that need to verify the authenticity of written content, detect AI-generated text, and promote responsible AI use.
What are the limitations of GPTZero?
Like all AI detectors, GPTZero may have false positives. It's important to use it as a guide, not as a definitive verdict. It also has character limits on the free plan.
What are some alternatives to GPTZero?
Alternatives include Turnitin, Originality.ai, and Copyleaks. But GPTZero is praised for its accuracy and education-focused features.
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