Grammarly vs StealthBypass
Head-to-head from the September 2026 cycle benchmark
Last tested
Prompts
33
Methodology
v1.2.0
Winner
60.35
overall
â–¼ 1
- Bypass
- 41.1
- Meaning
- 86.4
- Readability
- 66.1
Side-by-side metrics
Detector-level breakdown
Gold cell wins each row.
| Detector | Grammarly | StealthBypass |
|---|---|---|
| GPTZero | 15.9 | 69.3 |
| Winston AI | 38.9 | 56.3 |
| ZeroGPT | 58.0 | 84.4 |
| Copyleaks | 60.3 | 65.1 |
| Originality.ai | 43.4 | 58.5 |
Minimum monthly pricing
Grammarly
$30.00/mo
- Free tier
- Yes
StealthBypass
$4.99/mo
- Free tier
- Yes