GPTZero

GPTZero is an AI detection platform that identifies machine-generated content within documents and passages. Using advanced analysis, it scans for signatures of GPT-4, Claude, Gemini, Llama, and other models, pinpointing which sentences were likely written by AI.

Highlights

• Sentence-level detection with highlighting and explanations
• Multi-model scanning across ChatGPT, Claude, Gemini, Llama, and others
• Integrated plagiarism, grammar, and citation checkers
• Chrome extension and integrations with Google Docs, Canvas, Classroom
• Writing reports with video replay and human authorship verification

The platform serves over 17 million users in education, professional writing, recruitment, and content verification. Teachers use it to prevent academic dishonesty, writers confirm originality, and institutions verify content authenticity. The free tier supports up to 10,000 characters per check, while paid plans enable extended usage and team collaboration.