Head to head · September 2026 cycle
Penlify vs Walter Writes
Walter Writes finished 25.1 points ahead of Penlify in the September 2026 cycle, 61.70 to 36.57, ranking #10 against #14 in a field of 14. Walter Writes scored higher on 5 of 5 detectors and 7 of 7 writing categories. Penlify came out ahead on penalties (−5.0 vs −12.0), consistency across categories (100.0 vs 74.9) and readability (71.8 vs 60.4).
- Detectors
- 0 – 5
- Categories
- 0 – 7
- Components
- 3 – 2
Score components
What the overall score is made of: bypass rate weighs 42%, meaning preservation 32%, readability 16%, consistency across categories 10%. Output-quality penalties come off the total. How scoring works →
CIs overlap marks a gap that sits inside both tools' published 95% confidence intervals for that component; it may not survive another cycle.
Detector by detector
Share of each tool's outputs that a detector classified as human-written. Walter Writes took 5 of 5.
Writing categories
Category score per writing context: bypass credit only for real rewrites, blended with the category's own meaning preservation and readability. Small categories swing; the prompt count is shown on each row. How category scores work →
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
Penlify
3 wins- Penalties Score −5.0 vs −12.0
- Consistency Score 100.0 vs 74.9
- Readability Score 71.8 vs 60.4
Walter Writes
14 wins- Bypass rate Score 83.9 vs 0.0
- Meaning preservation Score 66.6 vs 62.7
- Originality.ai Detector 84.5 vs 0.0
- GPTZero Detector 78.3 vs 0.0
- Winston AI Detector 67.0 vs 0.4
- Copyleaks Detector 59.1 vs 0.0
- ZeroGPT Detector 76.0 vs 43.0
- Discussion Board Category 74.4 vs 32.1
- Blog Post Category 70.8 vs 37.3
- Application Essay Category 57.3 vs 35.9
- and 4 more
Questions people ask
Is Penlify better than Walter Writes?
Walter Writes finished 25.1 points ahead of Penlify in the September 2026 cycle, 61.70 to 36.57, ranking #10 against #14 in a field of 14. Walter Writes scored higher on 5 of 5 detectors and 7 of 7 writing categories. Both tools ran the same 33 prompts, scored by the same 5 detectors, under methodology v1.2.0; every input, output and verdict is published.
Which bypasses AI detectors better, Penlify or Walter Writes?
Walter Writes posted the higher bypass rate, 83.9 vs 0.0, and scored higher on 5 of 5 detectors. Walter Writes led on GPTZero, Originality.ai, Copyleaks, Winston AI and ZeroGPT.
Do Penlify and Walter Writes keep the original meaning?
Walter Writes preserved meaning better, 66.6 vs 62.7 on our 0–100 similarity scale, though the confidence intervals overlap. On readability, Penlify rated higher, 71.8 vs 60.4. Penalties this cycle: Penlify −5.0, Walter Writes −12.0.