AI Humanizer BenchmarkLeaderboard / Compare / Undetectable AI vs UndetectedGPT
Head to head · September 2026 cycle
Undetectable AI vs UndetectedGPT
UndetectedGPT finished 46.7 points ahead of Undetectable AI in the September 2026 cycle, 84.90 to 38.20, ranking #1 against #11 in a field of 11. UndetectedGPT scored higher on 7 of 7 detectors and 7 of 7 writing categories. Undetectable AI came out ahead on Consistency (99.6 vs 91.5), Meaning preservation (89.6 vs 84.8).
- Detectors
- 0 – 7
- Categories
- 0 – 7
- Components
- 2 – 3
- 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
Detector by detector
Share of each tool's outputs that a detector classified as human-written. UndetectedGPT took 7 of 7.
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.
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
Undetectable AI
2 wins- Consistency Score99.6 vs 91.5
- Meaning preservation Score89.6 vs 84.8
UndetectedGPT
17 wins- Bypass rate Score86.3 vs 0.2
- Penalties ScoreNone vs −12.0
- Readability Score77.3 vs 71.7
- Originality.ai Detector79.2 vs 0.0
- QuillBot Detector92.7 vs 16.6
- GPTZero Detector80.0 vs 6.1
- Grammarly Detector89.3 vs 18.5
- ZeroGPT Detector85.1 vs 26.5
- Winston AI Detector54.4 vs 0.1
- Copyleaks Detector21.2 vs 0.0
- Academic essay Category89.2 vs 48.0
- Discussion board Category90.3 vs 50.8
- Application essay Category86.2 vs 47.8
- Marketing copy Category85.8 vs 50.9
- News article Category85.9 vs 51.6
- Business email Category79.7 vs 50.9
- Blog post Category77.6 vs 52.9
Questions people ask
Is Undetectable AI better than UndetectedGPT?
UndetectedGPT finished 46.7 points ahead of Undetectable AI in the September 2026 cycle, 84.90 to 38.20, ranking #1 against #11 in a field of 11. UndetectedGPT scored higher on 7 of 7 detectors and 7 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, Undetectable AI or UndetectedGPT?
UndetectedGPT posted the higher bypass rate, 86.3 vs 0.2, and scored higher on 7 of 7 detectors. Undetectable AI led on none; UndetectedGPT led on GPTZero, Winston AI, Originality.ai, ZeroGPT, Grammarly, QuillBot and Copyleaks. The gap holds outside both tools' 95% confidence intervals.
Do Undetectable AI and UndetectedGPT keep the original meaning?
Undetectable AI preserved meaning better, 89.6 vs 84.8 on our 0–100 similarity scale. On readability, UndetectedGPT rated higher, 77.3 vs 71.7. Penalties this cycle: Undetectable AI −12.0, UndetectedGPT None.