AI Humanizer Benchmark

Leaderboard / Compare / AI Humanize vs Undetectable AI

Head to head · September 2026 cycle

AI Humanize vs Undetectable AI

AI Humanize finished 37.9 points ahead of Undetectable AI in the September 2026 cycle, 76.10 to 38.20, ranking #5 against #11 in a field of 11. AI Humanize scored higher on 7 of 7 detectors and 6 of 7 writing categories. Undetectable AI came out ahead on Consistency (99.6 vs 67.9), Meaning preservation (89.6 vs 70.8), Business email (50.9 vs 41.5).

AI HumanizeLeads
aihumanize.io
76.10/100
Overall score
#5/11
Rank
+37.9
AI Humanize leads
Detectors
70
Categories
61
Components
32
Undetectable AI
undetectable.ai
38.20/100
Overall score
#11/11
Rank
Last tested
2026-09-03
Prompts
33
Methodology
v1.0.0

Score components

What the overall score is made of: bypass rate weighs 42%, meaning preservation 32%, readability 16%, consistency across categories 10%. Output-quality penalties come off the total. How scoring works

AI HumanizeUndetectable AI
Bypass rateAI Humanize by 82.4
82.6
0.2
Meaning preservationUndetectable AI by 18.8
70.8
89.6
ReadabilityAI Humanize by 3.0
74.7
71.7
ConsistencyUndetectable AI by 31.7
67.9
99.6
Penaltiesfewer is betterAI Humanize by 12.0
None
−12.0

Detector by detector

Share of each tool's outputs that a detector classified as human-written. AI Humanize took 7 of 7.

AI HumanizeUndetectable AI
GPTZeroAI Humanize by 49.3
55.4
6.1
Winston AIAI Humanize by 80.9
81.0
0.1
Originality.aiAI Humanize by 23.2
23.2
0.0
ZeroGPTAI Humanize by 60.6
87.1
26.5
GrammarlyAI Humanize by 69.9
88.4
18.5
QuillBotAI Humanize by 72.7
89.3
16.6
CopyleaksAI Humanize by 66.7
66.7
0.0

Writing categories

Category score per writing context: bypass credit only for real rewrites, blended with the category's own meaning preservation and readability. Small categories swing; the prompt count is shown on each row.

Academic essayApplication essayBlog postBusiness emailMarketing copyDiscussion boardNews article
AI HumanizeUndetectable AIOuter ring = 100
AI HumanizeUndetectable AI
Academic essay6 promptsAI Humanize by 35.1
83.1
48.0
Application essay6 promptsAI Humanize by 26.9
74.7
47.8
Blog post6 promptsAI Humanize by 26.8
79.7
52.9
Business email3 promptsUndetectable AI by 9.4
41.5
50.9
Marketing copy6 promptsAI Humanize by 31.8
82.7
50.9
Discussion board3 promptsAI Humanize by 22.2
73.0
50.8
News article3 promptsAI Humanize by 30.6
82.2
51.6

Where each one wins

Every measure above that one tool won outright, largest margin first within each group.

AI Humanize

16 wins
  • Bypass rate Score82.6 vs 0.2
  • Penalties ScoreNone vs −12.0
  • Readability Score74.7 vs 71.7
  • Winston AI Detector81.0 vs 0.1
  • QuillBot Detector89.3 vs 16.6
  • Grammarly Detector88.4 vs 18.5
  • Copyleaks Detector66.7 vs 0.0
  • ZeroGPT Detector87.1 vs 26.5
  • GPTZero Detector55.4 vs 6.1
  • Originality.ai Detector23.2 vs 0.0
  • Academic essay Category83.1 vs 48.0
  • Marketing copy Category82.7 vs 50.9
  • News article Category82.2 vs 51.6
  • Application essay Category74.7 vs 47.8
  • Blog post Category79.7 vs 52.9
  • Discussion board Category73.0 vs 50.8

Undetectable AI

3 wins
  • Consistency Score99.6 vs 67.9
  • Meaning preservation Score89.6 vs 70.8
  • Business email Category50.9 vs 41.5

Questions people ask

Is AI Humanize better than Undetectable AI?

AI Humanize finished 37.9 points ahead of Undetectable AI in the September 2026 cycle, 76.10 to 38.20, ranking #5 against #11 in a field of 11. AI Humanize scored higher on 7 of 7 detectors and 6 of 7 writing categories. Both tools ran the same 33 prompts, scored by the same 7 detectors, under methodology v1.0.0; every input, output, and verdict is published.

Which bypasses AI detectors better, AI Humanize or Undetectable AI?

AI Humanize posted the higher bypass rate, 82.6 vs 0.2, and scored higher on 7 of 7 detectors. AI Humanize led on GPTZero, Winston AI, Originality.ai, ZeroGPT, Grammarly, QuillBot and Copyleaks; Undetectable AI led on none. The gap holds outside both tools' 95% confidence intervals.

Do AI Humanize and Undetectable AI keep the original meaning?

Undetectable AI preserved meaning better, 89.6 vs 70.8 on our 0–100 similarity scale. On readability, AI Humanize rated higher, 74.7 vs 71.7. Penalties this cycle: AI Humanize None, Undetectable AI −12.0.

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