September 2026 review · same 50 texts
Grubby vs HIX Bypass
In the September 2026 HumanizerEval review, Grubby and HIX Bypass rewrote the same 50 English texts. Grubby cleared all 5 detectors on 18 of them; HIX Bypass on 1. The difference is mostly Pangram: on 17 samples Grubby passed it where HIX Bypass failed, and the reverse never happened. On ZeroGPT and Winston AI the two were close to even.
Per-sample agreement
| Detector | Passed more often | Margin | Both passed | Neither passed |
|---|---|---|---|---|
| Pangram 4.0 | Grubby | 17 to 0 | 1 | 32 |
| GPTZero 2026-09-13-base | Grubby | 13 to 0 | 34 | 3 |
| Originality.ai turbo | Grubby | 17 to 0 | 32 | 1 |
| ZeroGPT default | Tied | 0 to 0 | 50 | 0 |
| Winston AI 5.0 | Grubby | 1 to 0 | 49 | 0 |
| All 5 detectors | Grubby | 17 to 0 | 1 | 32 |
Every count is computed from scores.csv at build time, not transcribed. “Neither passed” counts the texts that defeated both tools; on Pangram that was 32 of 50 here.
Quality and output discipline
| Measure | Grubby | HIX Bypass |
|---|---|---|
| 72% | 18% | |
| 46% | 6% | |
| 98% | 96% | |
| 94% | 66% | |
| 1.11 | 1.11 | |
| 0 | 0 | |
| 0 | 0 | |
| Academic | Latest | |
| Website | grubby.ai | hixbypass.com |
On per-sample quality scores, Grubby scored higher on 38 samples, HIX Bypass on 3, and the two tied on 9. Grubby’s output was shorter on 25 of 50 samples; mean length ratios were 1.11 and 1.11, or 11% longer than the input and 11% longer than the input respectively.
Where each one outperforms the other
Grubby
- Pangram: passed 18 of 50 against 1, including 17 samples where HIX Bypass failed, against 0 the other way.
- GPTZero: passed 47 of 50 against 34, including 13 samples where HIX Bypass failed, against 0 the other way.
- Originality.ai: passed 49 of 50 against 32, including 17 samples where HIX Bypass failed, against 0 the other way.
- Winston AI: passed 50 of 50 against 49, including 1 sample where HIX Bypass failed, against 0 the other way.
- Factual consistency: 72% against 18%.
- Naturalness: 46% against 6%.
- Syntax integrity: 98% against 96%.
- Stance preservation: 94% against 66%.
- Length: shorter output on 25 of 50 samples, which matters under a word limit.
HIX Bypass
- ZeroGPT: tied at 50 of 50 but on a higher mean human score, 96.5% to 96.0%. It passed 0 samples where Grubby failed.
Grubby vs HIX Bypass FAQ
Is Grubby better than HIX Bypass?
In the September 2026 HumanizerEval review, Grubby cleared all 5 detectors on 18 of the 50 shared samples and HIX Bypass on 1. On ZeroGPT and Winston AI the two were within 6 points of each other. Quality ran 38 samples to 3, with 9 ties.
Which humanizer is best for Pangram, Grubby or HIX Bypass?
Grubby. In September 2026, Grubby passed Pangram on 18 of the 50 shared samples and HIX Bypass on 1. On 17 samples Grubby passed where HIX Bypass failed; the reverse never happened. Both failed on 32.
Which humanizer changes the text less?
Grubby. It scored higher on per-sample quality on 38 of 50 samples, against 3. Grubby’s outputs averaged 1.11× the input length and passed factual consistency on 72%; HIX Bypass’s averaged 1.11× and passed on 18%. On stance preservation the split was 94% to 66%. Grubby produced the shorter output on 25 of 50 samples.
More comparisons
- StealthGPT vs Grubby
- StealthGPT vs HIX Bypass
- WriteHuman vs Grubby
- WriteHuman vs HIX Bypass
- Grubby vs Rephrasy
- Grubby vs Undetectable.ai
- Grubby vs RewriteAI
- Grubby vs Humbot
- Grubby vs BypassGPT
- Grubby vs Ryne
- Rephrasy vs HIX Bypass
- Undetectable.ai vs HIX Bypass
- RewriteAI vs HIX Bypass
- HIX Bypass vs Humbot
- HIX Bypass vs BypassGPT
- HIX Bypass vs Ryne
- Full September 2026 leaderboard: all 10 tools, 96.8% down to 23.6%