Effectiveness matrix

Which humanizers currently beat which detectors, and when each was last tested.

This is a living table. AI detectors and humanizers update constantly, so every result is dated. When a detector ships an update after a result was recorded, that cell is flagged ⚠ re-test, meaning the pairing may no longer hold. See how we compile entries.

Humanizer \ Detector	GPTZero	Originality.ai	Turnitin AI Detection	Copyleaks	Winston AI	Sapling AI Detector	Scribbr AI Detector	QuillBot AI Detector	ZeroGPT	Content at Scale AI Detector	Writer.com AI Content Detector
AISEO AI Humanizer	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Bypass AI	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
BypassGPT	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Clever AI Humanizer	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
GPTinf	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Grubby AI	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
HIX Bypass	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Humanize AI Pro	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Humbot	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Netus AI	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
NotepadLLM	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Phrasly	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Rephrasy	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
StealthGPT	Beats it	Partial / depends	Flagged	Beats it	Untested	Untested	Untested	Untested	Beats it	Untested	Untested
StealthWriter	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Twixify	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
Undetectable AI	Beats it	⚠ Flagged, needs re-test	Partial / depends	Beats it	Partial / depends	Untested	Untested	Untested	Beats it	Untested	Untested
Walter Writes AI	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested	Untested
WriteHuman	Beats it	⚠ Flagged, needs re-test	Untested	Partial / depends	Untested	Untested	Untested	Untested	Partial / depends	Untested	Untested

✓ Beats it ≈ Partial / depends ✗ Flagged · Untested ⚠ detector updated since last test

Freshness board: needs re-testing

These pairings were last tested before the detector's most recent update, so they may no longer be accurate:

Humanizer	Detector	Last tested
Undetectable AI	Originality.ai	Apr 5, 2026 · 4 months ago
WriteHuman	Originality.ai	May 1, 2026 · 3 months ago

Categories:

Effectiveness data
AI humanizers
AI content detectors