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The August 2026 results are in: WriteHuman holds #1, Undetectable AI falls to #8 on quality penalties.Read the full analysis →
HumanizerBench

Humanize AI Pro vs Stealth Writer

Head-to-head from the August 2026 cycle benchmark

Last tested
Sample size
33
Methodology
v1.2.0
Winner
71.40
overall
â–² 1
Bypass
83.5
Meaning
67.1
Readability
52.3
69.83
overall
â–² 1
Bypass
79.7
Meaning
72.0
Readability
43.7

Side-by-side metrics

Detector-level breakdown

Gold cell wins each row.

Detector Humanize AI Pro Stealth Writer
GPTZero 82.6 30.8
Winston AI 83.2 88.2
ZeroGPT 90.5 88.6
Copyleaks 65.5 73.5
Originality.ai 63.6 43.7

Minimum monthly pricing

Humanize AI Pro
$9.99/mo
Free tier
Yes
Stealth Writer
$20.00/mo
Free tier
Yes