Grammarly vs StealthGPT
Head-to-head from the August 2026 cycle benchmark
Last tested
Sample size
33
Methodology
v1.2.0
Winner
52.91
overall
â–² 1
- Bypass
- 0.0
- Meaning
- 94.3
- Readability
- 79.5
Side-by-side metrics
Detector-level breakdown
Gold cell wins each row.
| Detector | Grammarly | StealthGPT |
|---|---|---|
| GPTZero | 1.9 | 52.6 |
| Winston AI | 0.1 | 25.2 |
| ZeroGPT | 13.7 | 46.0 |
| Copyleaks | 0.0 | 24.2 |
| Originality.ai | 0.0 | 20.2 |
Minimum monthly pricing
Grammarly
$30.00/mo
- Free tier
- Yes
StealthGPT
$25.50/mo
- Free tier
- No