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.
GPTZero’s new Model 3.7b improves drastically on the latest language models from the top providers, just in time for the new 2025/2026 school year.
With our latest model update, GPTZero introduces higher granularity in our AI detector by adding a new classification called “Lightly edited by AI” or “Polished by AI”. This tag identifies text originally written by a human and later improved by AI.
Back in April, we released a major update (Model 3.1m) that outperformed competitors across the board. Since then, we’ve trained on more challenging human and AI data, and have achieved a less than 1% false positive rate on all supported languages (Model 3.2m).
Here at GPTZero, we’ve just launched our most advanced multilingual model yet. This is what’s new.
