AI Humanizer BenchmarkLeaderboard / Compare / GPTinf vs Undetectable AI
Head to head · September 2026 cycle
GPTinf vs Undetectable AI
GPTinf finished 40.1 points ahead of Undetectable AI in the September 2026 cycle, 78.30 to 38.20, ranking #4 against #11 in a field of 11. GPTinf scored higher on 7 of 7 detectors and 7 of 7 writing categories. Undetectable AI came out ahead on Consistency (99.6 vs 82.2), Meaning preservation (89.6 vs 75.7).
- Detectors
- 7 – 0
- Categories
- 7 – 0
- Components
- 3 – 2
- 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. GPTinf 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.
GPTinf
17 wins- Bypass rate Score79.9 vs 0.2
- Penalties ScoreNone vs −12.0
- Readability Score76.7 vs 71.7
- Grammarly Detector87.6 vs 18.5
- QuillBot Detector84.9 vs 16.6
- GPTZero Detector69.8 vs 6.1
- Winston AI Detector63.0 vs 0.1
- ZeroGPT Detector85.2 vs 26.5
- Copyleaks Detector57.6 vs 0.0
- Originality.ai Detector33.8 vs 0.0
- Academic essay Category85.3 vs 48.0
- Discussion board Category82.9 vs 50.8
- Application essay Category79.5 vs 47.8
- Marketing copy Category81.7 vs 50.9
- Blog post Category75.0 vs 52.9
- News article Category73.2 vs 51.6
- Business email Category61.8 vs 50.9
Undetectable AI
2 wins- Consistency Score99.6 vs 82.2
- Meaning preservation Score89.6 vs 75.7
Questions people ask
Is GPTinf better than Undetectable AI?
GPTinf finished 40.1 points ahead of Undetectable AI in the September 2026 cycle, 78.30 to 38.20, ranking #4 against #11 in a field of 11. GPTinf 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, GPTinf or Undetectable AI?
GPTinf posted the higher bypass rate, 79.9 vs 0.2, and scored higher on 7 of 7 detectors. GPTinf 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 GPTinf and Undetectable AI keep the original meaning?
Undetectable AI preserved meaning better, 89.6 vs 75.7 on our 0–100 similarity scale. On readability, GPTinf rated higher, 76.7 vs 71.7. Penalties this cycle: GPTinf None, Undetectable AI −12.0.