The specific risk for freelance writers

losing a paid assignment because a detector flagged AI-assisted drafting, even when the final piece was heavily edited by hand.

What detectors actually measure

AI detectors like GPTZero and Originality.ai score text on perplexity (how predictable the word choices are) and burstiness (how much sentence length varies). Neither signal proves authorship — both are statistical estimates, and independent research has documented false-positive rates that disproportionately affect certain writing styles, including non-native English patterns and simple, formulaic prose.

What this means in practice for freelance writers

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See our glossary entry on false positives for more on documented detector accuracy limits.