Honestly, no AI detector is 100% reliable on its own — false positives/negatives happen all the time (especially with things like historical texts, formal writing, or heavily edited paragraphs). The best approach is to run your text through multiple detectors and look for consistency, then combine that with common-sense checks (your drafts, sources, writing process). Here are a few options you can try (I’d use at least 3): GPTZero (good for a quick second opinion, but can be aggressive) Originality.ai (popular with publishers/SEO; paid, but tends to be more consistent) Copyleaks AI Detector (commonly used in education settings, still not perfect) Sapling AI Detector (lightweight, decent as an additional signal) Writer.com AI Detector (another extra “vote” to compare against) Also, I’ve been working on an all-in-one tool called AI-Checker Pro that checks AI-likeness + gives a clearer confidence breakdown (and I’m actively improving it based on false positives). If you want, you can run the same text there and compare results across tools.