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October 2026 results: WriteHuman holds #1, StealthGPT jumps to #2. Read the analysis →
HumanizerBench

SupWriter

SupWriter ranked #11 of 14 in the October 2026 cycle with an overall score of 62.75/100. Winston AI passed its output most often (83.5%), and Pangram passed none of it. It did best on news articles and worst on academic essays.

SupWriter is a standalone humanizer that shares one workspace with an AI detector, a paraphraser and a grammar checker. The humanizer has tone and purpose settings, the detector uses one scoring model with a 12-label guide, and there is an API and an MCP connector. A one-off free trial includes 300 word credits.

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Overall score
62.75/100
Detector bypass
50.0%
Overall rank
#11of 14
Prompts tested
30
See every test → How we score Fairness policy

Detector Bypass Rates

Each detector's average human-likelihood score on this tool's outputs, where 100 means every output was scored as human.

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

Academic Essay: 57.4Application Essay: 59.4Blog Post: 62.0Marketing Copy: 58.4Discussion Board: 57.6News Article: 64.4AcademicEssay57.4ApplicationEssay59.4BlogPost62.0MarketingCopy58.4DiscussionBoard57.6NewsArticle64.4

Strengths

  • Meaning preservation of 77.5, above the field median of 71.0
  • No scoring penalties this cycle

Weaknesses

  • Bypass rate of 50.0%, below the field median of 71.3%
  • Pangram classified none of its runs as human-written
  • Weakest writing category: academic essays (57.4)

From the October 2026 cycle, compared with the other 13 tools ranked in that cycle.

Evidence: every run

Every prompt SupWriter was run on in October 2026, and how each of the 6 detectors scored the output. Green: the detector called it human-written. Red: it was caught.

0 of 30 outputs passed all 6 detectors; 30 were caught by at least one.

Prompt GPT Pan Win Zero Copy Orig Mean Recording
Landing Copy · gemini-3-8-flash caught caught passed passed passed caught 0.55
Product Desc · gemini-3-8-flash caught caught passed passed passed caught 0.48
Landing Copy · gpt-6-sol caught caught passed passed passed passed 0.61
Discussion Post · gpt-6-sol caught caught caught passed passed caught 0.34
Product Desc · gpt-6-sol caught caught caught passed passed caught 0.35
Lit Review · claude-sonnet-5-5 caught caught passed passed passed passed 0.61
Lit Review · gpt-6-sol caught caught passed passed passed caught 0.43
Cover Letter · gpt-6-sol caught caught passed passed caught passed 0.38
Howto Blog · gemini-3-8-flash caught caught passed passed passed passed 0.58
Lit Review · gemini-3-8-flash caught caught passed passed passed caught 0.47
Landing Copy · claude-sonnet-5-5 caught caught passed passed passed caught 0.43
Personal Statement · gemini-3-8-flash caught caught passed passed passed caught 0.48
Argumentative Essay · gpt-6-sol caught caught passed passed caught passed 0.41
Listicle Blog · gemini-3-8-flash caught caught passed passed passed caught 0.49
Personal Statement · claude-sonnet-5-5 caught caught passed passed passed passed 0.64
Howto Blog · gpt-6-sol caught caught passed passed passed passed 0.59
Product Desc · claude-sonnet-5-5 caught caught passed passed passed passed 0.63
Listicle Blog · claude-sonnet-5-5 caught caught caught passed caught caught 0.32
Argumentative Essay · claude-sonnet-5-5 passed caught passed passed caught passed 0.54
News Article · gpt-6-sol caught caught passed passed passed caught 0.53
Howto Blog · claude-sonnet-5-5 caught caught passed passed passed passed 0.58
News Article · claude-sonnet-5-5 passed caught passed passed passed passed 0.82
Discussion Post · gemini-3-8-flash caught caught passed passed passed passed 0.64
Discussion Post · claude-sonnet-5-5 caught caught caught caught caught caught 0.14
Cover Letter · gemini-3-8-flash caught caught passed passed passed passed 0.62
Listicle Blog · gpt-6-sol passed caught passed passed passed caught 0.62
Cover Letter · claude-sonnet-5-5 caught caught caught passed caught caught 0.13
Personal Statement · gpt-6-sol caught caught passed passed passed passed 0.52
News Article · gemini-3-8-flash caught caught passed passed passed passed 0.62
Argumentative Essay · gemini-3-8-flash caught caught passed passed caught passed 0.44
Detector rate 8.9 0.0 hardest 83.5 73.9 78.2 55.5
Runs passed 3/30 0/30 25/30 29/30 23/30 16/30

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 scores from the 6 detectors, a continuous number, so a tool's pass count and its bypass rate will not be the same figure.

Read all 30 SupWriter outputs → Compare every tool on a prompt →

Session recording

History

Overall score compared with other ranked tools.

Latest score62.75/100
Score / 100 Shown range: 25–100
25 50 75 100 September 2026. Other 13 tools: median 67.58, middle 50% 60.97–72.94. October 2026. Other 13 tools: median 67.58, middle 50% 63.53–69.02. September 2026: 72.80/100 · #5. Other 13 tools: median 67.58, middle 50% 60.97–72.94. September 2026 October 2026: 62.75/100 · #11. Other 13 tools: median 67.58, middle 50% 63.53–69.02. October 2026 25 50 75 100 September 2026. Other 13 tools: median 67.58, middle 50% 60.97–72.94. October 2026. Other 13 tools: median 67.58, middle 50% 63.53–69.02. September 2026: 72.80/100 · #5. Other 13 tools: median 67.58, middle 50% 60.97–72.94. September 2026 October 2026: 62.75/100 · #11. Other 13 tools: median 67.58, middle 50% 63.53–69.02. October 2026
SupWriter Others’ median Others’ middle 50%

4.8 points below the median of 13 other tools in October 2026.

The shaded band is the 25th–75th percentile of other tools in each cycle. Scores are out of 100; higher is better.

Monthly pricing

Standard USD rates, billed month to month. Annual discounts and promotions excluded.

  • Basic

    $9.99/mo

    5,000 word credits per month.

    • Up to 500 words per request.

  • Pro

    $19.99/mo

    15,000 word credits per month.

    • Up to 2,000 words per request.

  • Ultra

    $39.99/mo

    30,000 word credits per month.

    • Up to 5,000 words per request.

Free access and trials

The free trial includes 300 word credits once; it is not a recurring free plan.

  • Credits are shared across humanizing, paraphrasing, grammar checking, and connected API/MCP usage. Web detection is free.
  • The API humanizer charges 1 credit per input word. The shared web credit pool is confirmed, but its humanizer debit formula is not separately stated.

Sample output

One AI-written passage from the October 2026 cycle and what SupWriter returned for it. This prompt was picked by a fixed rule, not by how the tool scored.

AI-written input

Every tool on this prompt →

Product Desc · Marketing Copy · written by claude-sonnet-5-5 · 199 words

**Precision Without Compromise: The Stainless-Steel Ruler**

Measure once, cut once. This precision-milled stainless-steel ruler is built for makers, machinists, engineers, and designers who refuse to settle for "close enough."

Each ruler is CNC-milled from a single bar of premium 304 stainless steel, then finished with a satin brushed surface that resists glare and fingerprints. The graduations are etched deep rather than printed, so they will never fade, smudge, or wear away, even after years of daily use in the shop, studio, or lab.

Markings are accurate to within ±0.01 inch, with clear imperial and metric scales on opposite edges. Fine 1/64" and 0.5 mm increments make detailed layout work effortless, while bold numerals keep readings fast and error-free.

The ruler's perfectly flat, square-ground edges make it a dependable straightedge for scribing, marking, and trimming. A cork backing prevents slipping on any surface, and a hanging hole at one end keeps it within easy reach at your bench.

Corrosion-resistant, durable, and surprisingly light, this ruler is a tool you'll pass down rather than replace.

**Features:** - 12-inch / 300 mm length - Etched dual scales - Cork non-slip back - Rust-resistant 304 stainless steel

Precision you can trust, for life.

Show the full input

SupWriter output

205 words (input 199)

**Stainless-steel ruler which provides uncompromising accuracy**

Check once, cut once. This stainless steel ruler machined with precision is ideal for makers, machinists, engineers and designers who use fine.

Each ruler is machined from a single bar of quality 304 stainless steel using CNC technology before being treated with a satin brushed coating to eliminate glare and fingerprints. The markings are carved deeply, not applied as ink, ensuring that they will not wear, rub off or fade, even after years of daily use in the shop, studio or lab.

The markings are accurate to ±0.01 inch, with clear imperial and metric markings on each edge. Use the fine 1/64″ and 0.5 mm increments for detailed layout work that is fast and mistake-free with the big bold numbers on this figure.

With the perfectly flat and square-ground edges, this ruler is a good straightedge for scribing marking and trimming. The non-slip cork backing will prevent slippage on any surface. Finally, the handy hole at one end will keep it close by on your bench.

Corrosion resistant durable and surprisingly light, you’ll pass this down rather than replace it.

Features. 12″/300 mm length. Etched dual scales. Cork non-slip back. Will not rust 304 stainless steel.

Precision for life.

Show the full output
  • GPTZero0.00caught
  • Pangram0.00caught
  • Winston AI0.99passed
  • ZeroGPT0.77passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed

Passed 4 of 6 detectors.

Every SupWriter run in October 2026 →

Each chip is one detector's score for that output, from 0 (AI) to 1 (human). A score of 0.50 or higher counts as a pass and shows green; below that the detector caught it and the chip shows red.

Compare with

SupWriter vs
Walter Writes
63.53 · rank #10
SupWriter vs
Phrasly
61.79 · rank #12
SupWriter vs
Humbot
61.74 · rank #13
Compare SupWriter with any tool → Every matchup →

Featured in

Best for GPTZero → Best for Originality.ai →

Questions about SupWriter

Answers are generated from the benchmark data and update every month. Last updated with the October 2026 cycle.

Is SupWriter good?

SupWriter ranked #11 of 14 in the October 2026 HumanizerBench cycle with an overall score of 62.75/100, below the field median of 66.78. On the parts of the score, it placed #13 of 14 on detector bypass, #4 of 14 on meaning preservation and #11 of 14 on readability.

Does SupWriter bypass AI detectors?

In the October 2026 cycle, SupWriter had a detector bypass rate of 50.0% (#13 of 14 tools). 0 of its 30 outputs passed all 6 detectors, and 30 were caught by at least one. Its average human-likelihood score from each detector, where 100 means every output was scored as human: Winston AI 83.5, Copyleaks 78.2, ZeroGPT 73.9, Originality.ai 55.5, GPTZero 8.9 and Pangram 0.0.

Can SupWriter bypass GPTZero?

In the October 2026 cycle, SupWriter's average human-likelihood score from GPTZero was 8.9 out of 100 (#13 of 14 tools against GPTZero). The highest average GPTZero score that cycle was 99.5, by WriteHuman. See every tool's GPTZero results.

Is SupWriter free?

The free trial includes 300 word credits once; it is not a recurring free plan. Paid plans start at $9.99 a month, billed monthly.

Is SupWriter legit?

SupWriter is a working AI humanizer at supwriter.com. HumanizerBench has tested it in 2 monthly cycles, most recently October 2026, when it completed 30 of 30 test runs. Every input and output from its runs is published with each detector's verdict.

Does SupWriter keep the original meaning?

SupWriter scored 77.5 out of 100 for meaning preservation in the October 2026 cycle (#4 of 14; field median 71.0). The score measures how close each rewrite stays to the meaning of the original text. Its readability score was 49.2 (#11 of 14). It drew no scoring penalties that cycle.

Which kinds of writing does SupWriter handle best?

In the October 2026 cycle, SupWriter did best on news articles (64.4/100) and worst on academic essays (57.4/100). On academic essays it ranked #13 of 14.

How has SupWriter ranked over time?

SupWriter has been ranked in 2 HumanizerBench cycles: #5 in September 2026 and #11 in October 2026. Its overall score went from 72.80 in September 2026 to 62.75 in October 2026.

What are the best alternatives to SupWriter?

In the October 2026 cycle, 10 tools ranked above SupWriter. The top three were WriteHuman (#1, 74.89/100), StealthGPT (#2, 74.50/100) and Undetectable.ai (#3, 71.18/100). Compare SupWriter with any of them side by side.

Badges

SupWriter is ranked in the October 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 →

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Overall

Detectors

SupWriter: ranked #11 AI humanizer on HumanizerBench, October 2026

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