ZeroGPT

An entry in the Humanizer Wiki directory of AI-text detectors.

Overview

ZeroGPT is a free, ad-supported detector that has become one of the most trafficked consumer AI checkers, largely because it requires no signup for basic use. It reports a percentage estimate of how much of a text appears AI-generated, highlights the sentences it suspects, and markets a proprietary analysis method it calls DeepAnalyse. Paid tiers add higher word limits, batch uploads, and downloadable reports. Its audience is broad: students, casual users, and writers looking for a quick signal.

Accuracy in practice

ZeroGPT markets accuracy around 98%, a figure that reflects favorable test sets more than typical use. Independent 2025–2026 testing reports meaningfully lower and more variable results, strong on unedited older-model output but weaker on newer models, and notably prone to false positives, with some reviews measuring double-digit false-positive rates on technical and academic prose. Accuracy also drops on short inputs and on text that has been paraphrased or humanized. The score is a probabilistic estimate rather than proof.

Summary

ZeroGPT is best understood as an accessible, free first-pass check. Its convenience is its main strength; its documented false-positive tendency and variable accuracy mean its scores are treated as a rough signal rather than a reliable verdict.

Humanizers vs. ZeroGPT

How each humanizer we track has fared against ZeroGPT, and when it was last tested. Full data in the effectiveness matrix.