AI Humanizer BenchmarkLeaderboard / Compare / GPTinf vs StealthGPT
Head to head · October 2026 cycle
GPTinf vs StealthGPT
On the October 2026 leaderboard, GPTinf leads StealthGPT 80.74 to 64.52, a gap of 16.22 points. GPTinf ranks #3 and StealthGPT ranks #9 out of 11 tools. GPTinf scores higher on 6 of 7 detectors and in all 7 writing categories. StealthGPT is ahead on readability (80.6 vs 77.7) and Copyleaks (60.6 vs 57.6).
- Detectors
- 6 – 1
- Categories
- 7 – 0
- Components
- 4 – 1
- Last tested
- Prompts
- 33
- Methodology
- v1.1.0
Score components
The overall score weights bypass rate at 42%, meaning preservation at 32%, readability at 16% and consistency across writing categories at 10%. Penalties for output-quality failures are then subtracted. Full scoring formula
Detector by detector
Each figure is one detector's average human-likelihood score across all of a tool's outputs, on a 0–100 scale. Higher means more human. GPTinf scores higher on 6 of 7 detectors.
Writing categories
Each category score applies the overall-score weights to that category's prompts only. Bypass, meaning preservation and readability are averaged within the category, and the tool's overall consistency score is added. Penalties are not subtracted. Categories with few prompts give less reliable scores, so each row shows its prompt count.
Where each one wins
Measures where one tool is ahead of the other. Ties are left out. Score components come first, then detectors, then categories, with the largest gap first in each group.
GPTinf
17 wins- Bypass rate Score88.7 vs 62.8
- Consistency Score92.1 vs 75.9
- Penalties ScoreNone vs −4.0
- Meaning preservation Score68.3 vs 67.7
- Winston AI Detector89.1 vs 55.3
- Originality.ai Detector92.2 vs 62.7
- QuillBot Detector86.4 vs 61.3
- Grammarly Detector88.4 vs 69.0
- ZeroGPT Detector84.5 vs 67.4
- GPTZero Detector55.1 vs 41.5
- Application essay Category79.7 vs 51.2
- Business email Category79.2 vs 59.5
- Discussion board Category84.0 vs 69.6
- News article Category84.1 vs 70.8
- Blog post Category77.6 vs 70.1
- Marketing copy Category81.1 vs 77.3
- Academic essay Category81.9 vs 78.3
StealthGPT
2 wins- Readability Score80.6 vs 77.7
- Copyleaks Detector60.6 vs 57.6
Questions people ask
Is GPTinf better than StealthGPT?
On the October 2026 leaderboard, GPTinf has an overall score of 80.74 and StealthGPT has 64.52, a gap of 16.22 points. GPTinf ranks #3 and StealthGPT ranks #9 out of 11 tools. GPTinf scores higher on 6 of 7 detectors and in all 7 writing categories. Both tools rewrote the same 33 prompts, the same 7 detectors checked every output, and scoring followed methodology v1.1.0. All inputs, outputs and detector verdicts are public.
Which bypasses AI detectors better, GPTinf or StealthGPT?
GPTinf has the higher bypass rate, 88.7% vs 62.8% for StealthGPT. GPTinf scores higher on GPTZero, Winston AI, Originality.ai, ZeroGPT, Grammarly and QuillBot. StealthGPT scores higher on Copyleaks. The two tools' 95% confidence intervals for bypass rate do not overlap.
Do GPTinf and StealthGPT keep the original meaning?
Meaning preservation measures how close each output stays to its input, using embedding similarity on a 0–100 scale. GPTinf scores 68.3 and StealthGPT scores 67.7. On readability, StealthGPT scores higher, 80.6 vs 77.7. This cycle, GPTinf had no penalties and StealthGPT lost 4.0 points to penalties.