Independent tests put the best detectors around 80-90% accuracy on clear cases — and far worse on short or edited text. They over-flag non-native writers and formal human prose. No detector is court-grade.
Detectors score probability patterns, not intent. A careful human who writes cleanly can score "AI"; a lightly edited AI draft can score "human." The signal is statistical, not certain.
Treat a detector as a rough edit flag, not a verdict. If your humanized draft still spikes, rewrite the spiking paragraph in your own voice. Our $45 tier includes a detector pass so you ship clean.
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