Draftback, Grammarly Authorship, Turnitin Clarity and GPTZero record how you write. A 2026 security analysis shows keystroke data proves a human typed the words, not that a human wrote them.

The 3.2x figure everyone cites has no primary source. Here is every published number on AI detector false positives for neurodivergent students, traced or marked untraceable.
HumanizerBench publishes its full testing methodology on GitHub — but it’s owned by WriteHuman, the tool currently ranked #1. We checked the math behind its July 2026 leaderboard by hand.

Yes, since April 2023 — but Turnitin’s 98% confidence claim and the peer-reviewed numbers disagree sharply: 61% accuracy on unmodified AI text, 26% after paraphrasing, and 100% false negatives on GPT-4o papers in 2026.

Turnitin does not license GPTZero, Copyleaks or Originality.ai. It runs a proprietary transformer classifier fine-tuned from an open-source Hugging Face base — here is the architecture, the published error rates and the independent test data.

Ryne AI and Undetectable AI both trash each other on their own blogs. Here’s the independent pricing, feature, and detector-performance breakdown neither vendor will give you.

AI Busted bundles a free AI detector and humanizer in one flow — but its upgrade buttons lead to Word Spinner. Verified free-tier limits, live pricing, and what no independent test can tell you yet.

UK FOI data shows 5.1 proven AI-misconduct cases per 1,000 students in 2023-24 — yet 94% of AI work goes undetected. Every sourced number for 2026.

A source-based Twixify review: verified 2026 pricing, the July V2.1.1 echowriting update, and why every detector test you can find online was published by a direct competitor.

Does Undetectable AI bypass Pangram? In independent testing, no — Undetectable AI output was flagged 100% AI-generated by Pangram Labs and scored 72% AI-probability on Quetext, while a competing tool, GPTHuman, passed the same Pangram test at 100% human-written. Vlad Ivanov — Creator of Words At Scale (26K+ YouTube subscribers). I test AI detectors and