GPTZero
An AI detection tool that identifies AI-generated content from models like ChatGPT, Claude, and Gemini. Offers free scanning, plagiarism checking, and integrations with educational platforms.
Visit website ↗What is GPTZero?
GPTZero is a leading AI content detection platform designed to identify text generated by large language models including ChatGPT, GPT-4, Claude, Gemini, LLaMA, and others. The tool uses advanced analysis techniques including perplexity, burstiness, and other components to detect AI-generated content at the sentence level with color-coded highlighting.
The platform serves multiple audiences including educators managing academic integrity, students verifying their own work, content creators and writers checking authenticity, recruiters screening applications, and organizations across publishing, legal, and hiring sectors. Over 380,000 educators and 2.5 million total users rely on GPTZero to maintain content authenticity and transparency.
GPTZero offers several products and integrations: a web interface for text scanning, a Chrome extension called Origin for one-click detection, Google Docs integration, Canvas and Google Classroom support, Microsoft Word add-ons, plagiarism checking capabilities, and an API for organizations to embed AI detection into their own tools and workflows. Users can paste or upload text and receive detailed reports with sentence-by-sentence analysis.
Pricing ranges from a free tier with 10,000 words monthly to professional plans supporting up to 500,000 words. Annual billing provides approximately 45% savings across paid tiers. The platform emphasizes transparency in AI use while supporting educational institutions and professional workflows that need reliable content verification.
Key features
- AI-generated text detection across multiple LLM models
- Sentence-level highlighting with color-coded AI sections
- Plagiarism and citation verification checking
- Hallucination detection capabilities
- Chrome extension for one-click scanning
- Google Docs and Microsoft Word integrations
- Canvas and Google Classroom support
- API for enterprise integration
- Writing report with process insights
- Educator dashboard for classroom management
- Batch document uploading and scanning
- Team collaboration features on paid tiers
How you can use it
Academic Integrity: Teachers and institutions use GPTZero to verify student submissions and maintain academic standards by identifying AI-assisted work that should be disclosed or revised.
Content Creator Verification: Writers, journalists, and publishers verify that their own content is authentically human-written before publication, protecting their reputation and reader trust.
Hiring and Recruitment: Recruiters scan applications and cover letters to ensure authenticity and flag potentially AI-generated submissions in hiring workflows.
Enterprise Content Compliance: Organizations across legal, publishing, and business sectors integrate GPTZero's API to embed AI detection into their workflows, maintaining transparency about AI use in content production.
Plans & pricing
Free Plan: 10,000 words/month, 10,000 characters per scan, no credit card required.
Paid Monthly Plans (with ~45% annual discounts):
- Essential: $14.99/month (or $8.33/month annual): 150,000 words, AI Vocabulary, Chrome extension, plagiarism check
- Premium: $23.99/month (or $12.99/month annual): 300,000 words, unlimited batch uploads, team seats
- Professional: $45.99/month (or $24.99/month annual): 500,000 words, 250-file batches, API access
- Classroom/Enterprise: Per-seat pricing with Canvas, Google Classroom, and Moodle integrations
Annual billing provides roughly 45% discount off paid tiers. Free plan comes with limitations including a 10,000-word cap per month.
The strengths & trade-offs
Pros
- Generous free tier with 10,000 words monthly at no cost
- High accuracy with sentence-level detection and explanation
- Multiple integration options (Chrome, Google Docs, Canvas, API)
- Affordable paid plans with significant annual savings
- Trusted by over 380,000 educators and 2.5 million users
- Supports detection across multiple leading AI models
- No credit card required for free plan
Cons
- False positive rate documented on non-native English and formulaic academic writing
- Detection accuracy decreases on humanized or hybrid human-AI text
- Limited to text-based detection; does not analyze images or audio
- Plagiarism checker more focused on AI detection than catching direct copying
- May struggle keeping pace with newer AI technologies
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Frequently asked questions
Is there a free trial?
Without signing up, you can test the tool directly on the homepage, limited to 7 free trials per day. After signing up, you receive 10,000 words monthly and 33 free trials per day.
Do I need a credit card for the free plan?
GPTZero has a genuinely usable free plan covering 10,000 words a month with no credit card required.
How accurate is GPTZero?
GPTZero is the first and leading AI detector with 99% accuracy according to independent benchmarks, though GPTZero's false-positive rate is documented on non-native English writing, heavily-edited human prose, and highly-formulaic academic writing.
What AI models does GPTZero detect?
GPTZero identifies AI-generated content from various models such as ChatGPT, GPT4, Bard, LLaMa, and others.
Can I use GPTZero in my classroom?
Over 380,000 educators use GPTZero to maintain academic integrity and detect AI-generated student work. GPTZero is used in select classrooms to request edits from writers and allows authors to focus on editing AI text in a supervised environment with monitoring of copy-pastes.
Does GPTZero offer an API?
GPTZero has developed an easy-to-use API for organizations to detect AI content, allowing businesses to integrate AI detection abilities into their own tools and workflows.