AI Humanizer BenchmarkLeaderboard / Compare / GPTinf vs SmartHumanizer
Head to head · October 2026 cycle
GPTinf vs SmartHumanizer
On the October 2026 leaderboard, GPTinf leads SmartHumanizer 80.74 to 80.20, a gap of 0.54 points. GPTinf ranks #3 and SmartHumanizer ranks #4 out of 11 tools. GPTinf scores higher on 6 of 7 detectors and in 3 of 7 writing categories. SmartHumanizer is ahead on meaning preservation (82.9 vs 68.3), Copyleaks (72.7 vs 57.6) and academic essay (87.6 vs 81.9). On bypass rate, SmartHumanizer scores 78.2% and GPTinf scores 88.7%, but their 95% confidence intervals overlap, so that difference is not statistically clear.
- Detectors
- 6 – 1
- Categories
- 3 – 4
- Components
- 3 – 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
Overlapping CIs means the two tools' 95% confidence intervals for bypass rate overlap, so the bypass difference is not statistically clear.
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
12 wins- Bypass rate Score88.7 vs 78.2
- Consistency Score92.1 vs 84.3
- Readability Score77.7 vs 77.5
- Winston AI Detector89.1 vs 60.0
- GPTZero Detector55.1 vs 28.3
- Originality.ai Detector92.2 vs 82.9
- ZeroGPT Detector84.5 vs 77.1
- Grammarly Detector88.4 vs 81.6
- QuillBot Detector86.4 vs 80.4
- Blog post Category77.6 vs 72.2
- Business email Category79.2 vs 74.5
- Application essay Category79.7 vs 75.6
SmartHumanizer
6 wins- Meaning preservation Score82.9 vs 68.3
- Copyleaks Detector72.7 vs 57.6
- Academic essay Category87.6 vs 81.9
- Discussion board Category88.6 vs 84.0
- News article Category85.4 vs 84.1
- Marketing copy Category81.4 vs 81.1
Questions people ask
Is GPTinf better than SmartHumanizer?
On the October 2026 leaderboard, GPTinf has an overall score of 80.74 and SmartHumanizer has 80.20, a gap of 0.54 points. GPTinf ranks #3 and SmartHumanizer ranks #4 out of 11 tools. GPTinf scores higher on 6 of 7 detectors and in 3 of 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 SmartHumanizer?
GPTinf has the higher bypass rate, 88.7% vs 78.2% for SmartHumanizer. GPTinf scores higher on GPTZero, Winston AI, Originality.ai, ZeroGPT, Grammarly and QuillBot. SmartHumanizer scores higher on Copyleaks. The two tools' 95% confidence intervals for bypass rate overlap, so the difference is not statistically clear.
Do GPTinf and SmartHumanizer keep the original meaning?
Meaning preservation measures how close each output stays to its input, using embedding similarity on a 0–100 scale. SmartHumanizer scores 82.9 and GPTinf scores 68.3. On readability, GPTinf scores higher, 77.7 vs 77.5. Neither tool had penalties this cycle.