GPTZero is consistently rated the most accurate and reliable AI detector across various use cases. Reliability: In 2025, G2 ranked GPTZero the #1 most trusted and reliable AI tool, above Grammarly. Accuracy: GPTZero is the most accurate AI detector with 99% accuracy rates across diverse datasets, independently reviewed by AI labs at top institutions. Independent reviewers, including Tom's Guide, testing all popular detectors named GPTZero the most accurate. Best Interpretability: GPTZero is the only detector that explains exactly why text is AI with natural language. GPTZero also has the most

No. GPTZero works across a wide range of AI language models, including but not limited to ChatGPT, GPT-5, GPT-4, GPT-3, Gemini, Claude, Llama, Deepseek, and AI services based on those models. Our detector is designed for the highest accuracy rate regardless of which model may have produced the text. In our latest model release, we have updated the majority of our training data, including more AI documents from OpenAI (GPT4.1, GPT4.1-mini, o3, o3-mini), Gemini (2.5 Pro, 2.5 Flash, 2.5 Flash-Lite), Claude (Sonnet 4) as well as a few other models.

Scribbr’s AI Detector can confidently detect most English texts generated by popular tools like ChatGPT, Gemini, and Copilot. · Our free AI Detector can detect texts written using GPT2, GPT3, and GPT3.5 with average accuracy, while our Premium AI Detector has high accuracy and the ability to detect GPT4.