Gptzero · since 2023-01-03 · 23× · last seen Jul 26, 2026
GPTZero is a cloud-based AI detection tool that uses a deep-learning model (currently Model 3.7b / 3.15b) to determine whether text was generated by large language models such as ChatGPT, GPT-5, Claude, Gemini, or Llama. Detection operates at sentence, paragraph, and document level; a dedicated API endpoint enables integration into third-party systems. Founded on January 3, 2023 by Edward Tian and Alex Cui, GPTZero was acquired by Superhuman (formerly Grammarly) in June 2026 but continues to operate as a standalone product. With more than 10 million users and 100+ institutional partners across education, publishing, HR, and legal sectors, it is one of the most widely used AI detectors in the English-speaking education market.
Features
| Durchsatz/Latenz | Recall bei 1% Falsch-Positiv-Rate: 96,8% auf GPT-4.1, 99,1% auf Claude Sonnet 4; Genauigkeit bei gemischten Dokumenten 96,5%; Falsch-Positiv-Rate unter 1% |
| Lizenz | Proprietäre, kommerzielle Closed-Source-Software (SaaS) |
| Plattform | Web-App (gptzero.me), Chrome-Erweiterung, Google Docs Add-on, Integrationen mit Canvas, Moodle, Google Classroom, Zapier |
| Preis | Kostenlose Version (bis 10.000 Wörter/Monat); kostenpflichtige Pläne ab ca. $8,33/Monat (jährlich abgerechnet), Essential ca. $15/Monat, Premium ca. $24/Monat, Professional ca. $46/Monat |
| Protokoll-Kompatibilität | REST-API mit Feldern wie document_classification, class_probabilities, confidence_category, highlight_sentence_for_ai; SDKs/Codebeispiele in 17 Sprachen (u.a. Node.js, Python, C#, Java, PHP) |
| Release-Datum | Januar 2023 (Launch); aktuelles Detektionsmodell 3.7b veröffentlicht im August 2025 |
| Unterstützte Modelle/Provider | ChatGPT (GPT-3, GPT-4, GPT-5), Google Gemini, Meta Llama, Anthropic Claude, DeepSeek und darauf basierende Dienste |