Here’s my deal with Zerogpt: it’s like trying to figure out if someone’s lying by checking if they blink too much. Sometimes you nail it, sometimes you’re just annoyingly wrong. Zerogpt uses stuff like how repetitive your phrasing is, sentence variation, word choice “predictability”, and probably runs that against what it thinks is classic human vs. AI writing style. So yeah, it’s math and vibes.
Accuracy-wise? Meh. I had a friend’s essay that was basically a sleep-deprived ramble get tagged as “100% AI generated”—guess he’s secretly a bot. On the flip side, GPT-generated stuff can skate by if you tinker enough (swap opening lines, butcher a few metaphors). The tech just isn’t there for a true “AI detector”; it’s like a really judgy spellcheck with mood swings.
Personally, I’m not totally in line with the always-casual vibe from the other replies saying you should brush off low scores. I’ve seen professors and clients take ANY flagged percentage way too seriously, so if this matters to you, cross-check with at least two detectors and expect discrepancies. One time Copyleaks said “possibly AI,” Zerogpt said “mostly human,” and Originality threw a “Who even writes like this?” error at me—can you blame me for being skeptical?
Bottom line: Zerogpt is fine for a quick vibe check but don’t treat it like it bears the Ten Commandments. If you write super clean or edit a lot, it’ll flag you. If you write a rambling mess, also flagged. Basically, exist in that sweet spot of human mediocrity and you’re probably good.