StealthGPT vs Undetectable.ai
Head-to-head from the August 2026 cycle benchmark
Last tested
Sample size
33
Methodology
v1.2.0
Winner
61.49
overall
â–¼ 6
- Bypass
- 86.0
- Meaning
- 72.1
- Readability
- 55.2
Side-by-side metrics
Detector-level breakdown
Gold cell wins each row.
| Detector | StealthGPT | Undetectable.ai |
|---|---|---|
| GPTZero | 52.6 | 86.6 |
| Winston AI | 25.2 | 87.5 |
| ZeroGPT | 46.0 | 89.8 |
| Copyleaks | 24.2 | 65.3 |
| Originality.ai | 20.2 | 66.1 |
Minimum monthly pricing
StealthGPT
$25.50/mo
- Free tier
- No
Undetectable.ai
$19.00/mo
- Free tier
- Yes