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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
🥉 Ranked the 3rd-best AI humanizer · August 2026 cycle

Stealth Writer

AI Humanizer · stealthwriter.ai
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Stealth Writer is an AI humanizer independently benchmarked by HumanizerBench. It ranked #3 of 12 in the August 2026 cycle with an overall score of 69.83/100 — our composite measure of how reliably it evades AI detectors while preserving the original meaning and readability.

69.83 / 100
overall score
79.7 %
median detector bypass rate
33 /33
successful tests
Last tested
Sample size
33
Methodology
v1.2.0

Detector Bypass Rates

Percentage of samples classified as human-written by each detector.

Performance by Category

Bypass rate across writing contexts.

12-Month Trend

Overall score across the past year of testing cycles.

Session recordings

See the full methodology →

Screen captures from the benchmark runs, kept for auditability. Hosted links may expire over time; the JSON in this repo is the source of truth.

Penalties applied this cycle

How penalties work →

The overall score shown above already reflects these deductions.

  • Length inflation
    −1.0

    The output ran much longer than the input, a common trick that pads text to dilute the AI signal.

Total deducted from overall score −1.0

Minimum monthly pricing

Monthly
$20.00/mo
Free tier
Yes

How we tested

33 prompts across 7 writing categories, scored by 5 independent AI detectors. Every score is reproducible from the public methodology.

Methodology → Fairness policy →

Compare with

Stealth Writer vs
Humanize AI Pro
71.40 · rank #2
Stealth Writer vs
HIX Bypass
67.93 · rank #4
Stealth Writer vs
Humbot
66.95 · rank #5

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