GPTZero achieved 97% recall on Claude Sonnet 4.5 at 1% false positives, surpassing its initial 95% on GPT-5. Detection remains strong across new models, with recall now over 99%.
In GPTZero's August 2025 update, we improved our GPT-5 detection rate to over 97%, adapting quickly to the latest AI models.
We’re beyond proud to share that out of hundreds of AI tools, GPTZero has been named as the #1 Best AI Software Product of 2025.
An overview of how AI detectors like GPTZero, TurnitIn, and Copyleaks compare in terms of accuracy rate, error rate, false positives and negatives for identifying AI-generated content.
GPTZero expands its AI detection coverage of LLMs to OpenAI’s latest reasoning models; see our internal benchmarking on how we compare to other AI detectors.
