Head to head · September 2026 cycle
AI Humanize io vs Grammarly
AI Humanize io finished 12.6 points ahead of Grammarly in the September 2026 cycle, 72.94 to 60.35, ranking #4 against #12 in a field of 14. AI Humanize io scored higher on 5 of 5 detectors and 7 of 7 writing categories. Grammarly came out ahead on meaning preservation (86.4 vs 73.2), consistency across categories (78.7 vs 69.2) and readability (66.1 vs 58.4).
- Detectors
- 5 – 0
- Categories
- 7 – 0
- Components
- 2 – 3
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. AI Humanize io took 5 of 5.
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. How category scores work →
Head-to-head history
Overall score in every cycle both tools were tested. AI Humanize io has finished ahead in 4 of 4 shared cycles.
| Cycle | AI Humanize io | Grammarly | Margin |
|---|---|---|---|
| September 2026 | 72.94 #4 | 60.35 #12 | ← 12.6 |
| August 2026 | 64.57 #6 | 52.91 #11 | ← 11.7 |
| July 2026 | 59.66 #10 | 53.38 #12 | ← 6.3 |
| June 2026 | 72.95 #6 | 56.50 #12 | ← 16.5 |
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
AI Humanize io
14 wins- Bypass rate Score 81.5 vs 41.1
- Penalties Score −1.0 vs −3.0
- Originality.ai Detector 93.3 vs 43.4
- Winston AI Detector 79.0 vs 38.9
- GPTZero Detector 55.8 vs 15.9
- ZeroGPT Detector 75.0 vs 58.0
- Copyleaks Detector 60.6 vs 60.3
- Marketing Copy Category 82.4 vs 56.5
- Blog Post Category 80.9 vs 58.9
- Discussion Board Category 62.5 vs 44.5
- and 4 more
Grammarly
3 wins- Meaning preservation Score 86.4 vs 73.2
- Consistency Score 78.7 vs 69.2
- Readability Score 66.1 vs 58.4
Questions people ask
Is AI Humanize io better than Grammarly?
AI Humanize io finished 12.6 points ahead of Grammarly in the September 2026 cycle, 72.94 to 60.35, ranking #4 against #12 in a field of 14. AI Humanize io scored higher on 5 of 5 detectors and 7 of 7 writing categories. Both tools ran the same 33 prompts, scored by the same 5 detectors, under methodology v1.2.0; every input, output and verdict is published.
Which bypasses AI detectors better, AI Humanize io or Grammarly?
AI Humanize io posted the higher bypass rate, 81.5 vs 41.1, and scored higher on 5 of 5 detectors. AI Humanize io led on GPTZero, Originality.ai, Copyleaks, Winston AI and ZeroGPT.
Do AI Humanize io and Grammarly keep the original meaning?
Grammarly preserved meaning better, 86.4 vs 73.2 on our 0–100 similarity scale. On readability, Grammarly rated higher, 66.1 vs 58.4. Penalties this cycle: AI Humanize io −1.0, Grammarly −3.0.