SupWriter
SupWriter is an AI humanizer independently benchmarked by HumanizerBench. It ranked #5 of 14 in the September 2026 cycle with an overall score of 72.80/100, our composite measure of how reliably it evades AI detectors while preserving the original meaning and readability.
- 72.80 /100
- overall score
- 80.3 %
- median detector bypass rate
- #5 of 14
- rank, September 2026
- last tested
33 prompts 7 writing categories 5 AI detectors methodology v1.2.0
Detector Bypass Rates
Percentage of runs classified as human-written by each detector.
Performance by Category
Category score across writing contexts: bypass credit only for real rewrites, blended with each category's meaning and readability. How it's computed
Evidence: every run
Every prompt SupWriter was run on in September 2026, and how each of the 5 detectors scored the output. Green: the detector called it human-written. Red: it was caught.
5 of 33 outputs passed all 5 detectors; 28 were caught by at least one.
| Prompt | GPT GPTZero | Win Winston AI | Zero ZeroGPT | Copy Copyleaks | Orig Originality.ai | Median | Recording |
|---|---|---|---|---|---|---|---|
| Argumentative Essay · GPT-5.5 | caught | passed | passed | passed | passed | 0.78 | |
| Discussion Post · Gemini 3.5 Flash | caught | passed | passed | passed | caught | 1.00 | |
| Personal Statement · GPT-5.5 | caught | passed | passed | passed | passed | 1.00 | |
| Discussion Post · Claude Sonnet 5 | caught | passed | passed | passed | caught | 0.74 | |
| News Article · GPT-5.5 | passed | passed | passed | passed | passed | 0.97 | |
| Product Desc · Claude Sonnet 5 | caught | passed | passed | passed | passed | 1.00 | |
| Cover Letter · Claude Sonnet 5 | caught | caught | passed | passed | passed | 0.63 | |
| Personal Statement · Claude Sonnet 5 | caught | passed | passed | passed | passed | 0.91 | |
| Business Email · Gemini 3.5 Flash | caught | caught | passed | caught | passed | 0.00 | |
| Lit Review · Gemini 3.5 Flash | caught | passed | passed | passed | passed | 1.00 | |
| Discussion Post · GPT-5.5 | caught | passed | passed | passed | passed | 1.00 | |
| Argumentative Essay · Gemini 3.5 Flash | caught | passed | passed | passed | passed | 1.00 | |
| Landing Copy · Gemini 3.5 Flash | caught | passed | passed | passed | passed | 1.00 | |
| Argumentative Essay · Claude Sonnet 5 | caught | passed | passed | passed | passed | 0.99 | |
| Lit Review · GPT-5.5 | caught | passed | passed | passed | passed | 0.97 | |
| Howto Blog · GPT-5.5 | passed | passed | passed | passed | passed | 0.93 | |
| Product Desc · Gemini 3.5 Flash | passed | passed | passed | passed | passed | 1.00 | |
| Lit Review · Claude Sonnet 5 | caught | passed | passed | passed | passed | 0.86 | |
| Personal Statement · Gemini 3.5 Flash | caught | passed | passed | passed | passed | 1.00 | |
| Landing Copy · GPT-5.5 | caught | passed | passed | passed | passed | 1.00 | |
| Cover Letter · Gemini 3.5 Flash | caught | caught | passed | passed | caught | 0.38 | |
| Cover Letter · GPT-5.5 | caught | caught | passed | passed | caught | 0.02 | |
| Landing Copy · Claude Sonnet 5 | caught | passed | passed | passed | passed | 1.00 | |
| News Article · Gemini 3.5 Flash | caught | passed | passed | passed | passed | 0.97 | |
| Listicle Blog · GPT-5.5 | passed | passed | passed | passed | caught | 1.00 | |
| Business Email · GPT-5.5 | caught | caught | passed | caught | caught | 0.00 | |
| Listicle Blog · Gemini 3.5 Flash | passed | passed | passed | passed | passed | 0.99 | |
| Product Desc · GPT-5.5 | caught | passed | caught | passed | passed | 0.98 | |
| Listicle Blog · Claude Sonnet 5 | caught | passed | passed | caught | passed | 0.59 | |
| Howto Blog · Claude Sonnet 5 | passed | passed | passed | caught | passed | 0.83 | |
| Business Email · Claude Sonnet 5 | caught | caught | passed | caught | caught | 0.01 | |
| Howto Blog · Gemini 3.5 Flash | passed | passed | passed | passed | passed | 0.99 | |
| News Article · Claude Sonnet 5 | caught | passed | passed | passed | passed | 0.96 | |
| Detector rate (mean human-likelihood) | 21.0 hardest | 81.5 | 77.9 | 85.3 | 78.5 | ||
| Runs passed | 7/33 | 27/33 | 32/33 | 28/33 | 26/33 |
A dot is green when the detector's human-likelihood score for that run was 0.50 or higher. The detector rate is the mean of that detector's scores across the runs, the same number the detector pages rank by; it is not the count of green dots, which the Runs passed row shows. Hover a dot for the score.
How to read these scores
Each detector returns a human-likelihood on a common 0 to 1 scale, where 1 means it judged the text human-written and 0 means it flagged it as AI. On these pages a verdict counts as passed when that score is at least 0.50, the midpoint of the detector's own scale. That threshold exists only to draw the chips: the bypass rate on the leaderboard is the mean of each test's median score across the 5 detectors, a continuous number, so a tool's pass count and its bypass rate will not be the same figure.
History
Rank and overall score in every cycle SupWriter was tested.
| Cycle | Rank | Overall | Bypass |
|---|---|---|---|
| September 2026 | #5 | 72.80 | 80.3% |
Minimum monthly pricing
- Monthly
- $9.99/mo
- Free tier
- Yes 500 words
Base paid plan at its month-to-month price, not the annual rate.
Compare with
Badges
SupWriter is ranked in the September 2026 cycle, so it can embed any of these cards for free, and the live file re-renders every cycle, including when a rank falls. Usage rules →
Pinning a month for a press page? Use https://humanizerbench.com/badge/supwriter/september-2026.svg, which renders September 2026 forever.