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

← October 2026 prompts

Product Desc · claude-sonnet-5-5

Marketing Copy · written by claude-sonnet-5-5 · 199 words · prompt product_desc

9
passed at least 5 detectors
11
failed at least one detector
14
tools tested on this prompt
Pangram
hardest detector, caught 11 of 14

Input passage

Generated by claude-sonnet-5-5; this exact text was pasted into every humanizer below.

**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.

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.

Meaning is the input↔output embedding cosine and readability is a language-model writing-quality rating, both published per test in tests.json. Words is the output's length as a multiple of the input's; the scoring code penalizes ratios above 1.40 or below 0.60. Full definitions live in the methodology.

Humanized outputs

Ordered by how many detectors each rewrite passed; ties fall back to this cycle's rank. Each block shows what the tool returned and how the 6 detectors scored it.

WriteHuman

Rank #1 this cycle · run took 0:13

6/6 detectors passed
  • GPTZero1.00passed
  • Pangram1.00passed
  • Winston AI0.99passed
  • ZeroGPT0.78passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Mean
0.96
Meaning
87.4
Readability
42.0
Words
1.18× 199 → 234
Show output (234 words)

This Stainless Steel Ruler Some people are passion-driven to push the boundaries of their craft and obsess over the minor details that separate an excellent product from an ordinary one. If you are passionate about your craft and desire to provide your clients with the best product possible, you need a ruler that meets your exacting standards. Designed to meet the demands of craftsmen and designers, this ruler is made by precision-milling a single bar of stainless steel. Unlike ordinary rulers, the graduations on this ruler will not wear off. The graduations are deep etchings. This stainless steel ruler is also glare-free and fingerprint-resistant. It is also corrosion resistant. Because of the precision in the manufacture of this ruler, markings can be made to within 0.01 inches of tolerance. The ruler has both imperial and metric scales of measurements. The graduations of the ruler are bold. Because of the precision in the manufacture of this ruler, it can function as an accurate straight edge for trimming, marking and scribing. A cork backing prevents ruler from sliding and a hole through one end enables the ruler to be hung up, gives the ruler a multifunctional design. It is a ruler you will not need to replace. - Etched imperial and metric ruler scales - Rulers are made from 304 stainless steel - A cork back, non-slip edge - Rulers are 300mm (1 foot) in length

StealthGPT

Rank #2 this cycle · run took 1:01

6/6 detectors passed
  • GPTZero1.00passed
  • Pangram1.00passed
  • Winston AI0.99passed
  • ZeroGPT0.68passed
  • Copyleaks1.00passed
  • Originality.ai0.94passed
Mean
0.93
Meaning
94.9
Readability
62.0
Words
1.18× 199 → 234
Show output (234 words)

Precision Without Compromise: The Stainless-Steel Ruler CNC-milled from a single bar of 304 stainless steel, this durable and lightweight ruler will last you a lifetime. The satin brushed finish is glare- and fingerprint-resistant. Graduations are deeply etched (not printed) and won’t wear away with heavy use. Graduations within ±0.01 inch on a 12-inch / 300 mm ruler Dual imperial and metric graduations on opposing edges Graduated in 1/64” and 0.5 mm increments for quick, easy-to-read measurements Can be used as a straightedge for accurate marking Corrosion and rust-resistant Includes hole for convenient hanging For makers, machinists, engineers, and designers who refuse to settle for "close enough." This ruler’s satin brushed 304 stainless-steel body is durable, lightweight, and will never rust. Graduations are laser-engraved, not printed, and won’t smudge, fade, or wear away over years of daily shop, studio, and lab use. Bold numbers make measurements easy-to-read and precise. Use the ruler to make quick and accurate measurements, graduated in imperial (1/64”) and metric (0.5 mm) on opposite edges, or as a straightedge to make precise scribe and layout marks, or even trim paper or other items. The ruler’s perfectly flat, square-ground edges ensure accuracy. Cork backing provides a non-slip surface. A hole at one end makes storing the ruler on your bench easy. Keep it nearby for quick access. This ruler will become an integral tool in your toolbox. It will last a lifetime.

Phrasly

Rank #12 this cycle · run took 0:19

6/6 detectors passed
  • GPTZero1.00passed
  • Pangram1.00passed
  • Winston AI1.00passed
  • ZeroGPT1.00passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Mean
1.00
Meaning
92.8
Readability
38.0
Words
0.97× 199 → 194
Show output (194 words)

**Precision Without Compromise: The Stainless-Steel Ruler** Measure once cut once. This rule was CNC milled from a piece of 304 stainless steel bar stock and given a satin finish. The rules will out last any rule you currently have in your possession. Since the graduation are etched into the rule they will never wear off or rub away from constant use. The markings on this rule are accurate to .01 inch. Both imperial and metric are included on opposite edges of the rule. With markings every 1/64th of an inch and every 0.5 millimeters your layout tasks will become quick and easy. Numbers are made larger to allow quicker reading. Due to the rule having a flat perfectly square edge you can also use it as a straight edge when needed. Cork backing allows you to place the rule on any surface without the worry of it sliding around. Hang the rule on the end to have it close by at all times. This rule is rust resistant light weight and will out live you. **Features:** - 12 inch long - Rules are etched - Cork backing - 304 Stainless Steel Built to last.

Undetectable.ai

Rank #3 this cycle · run took 0:18

5/6 detectors passed
  • GPTZero1.00passed
  • Pangram0.00caught
  • Winston AI1.00passed
  • ZeroGPT0.92passed
  • Copyleaks1.00passed
  • Originality.ai0.71passed
Mean
0.77
Meaning
98.1
Readability
78.0
Words
1.15× 199 → 229
Show output (229 words)

**Precision Without Compromise: The Stainless-Steel Ruler** With our Stainless-Steel Ruler, makers, machinists, engineers and designers can measure once and cut once. We have created this precision tool for use in the shop, studio or lab. Each ruler is carefully CNC-milled from a single bar of premium 304 stainless steel. It is then finished with a satin brushed surface to repel glare and fingerprints. Rather than printing the graduations, they are etched deep into the ruler for a permanent marker. Ruler markings are accurate to within ±0.01 inches and are shown as imperial and metric measurements on opposing sides of the Ruler. Fine 1/64” and 0.5 mm graduations are also marked on the Ruler allowing for accurate layout work. Alternatively, bold numbered markings provide immediate and accurate measurement readings. The perfectly flat and square ground edges of the Stainless Steel Ruler make it an excellent straightedge for scribing, marking, and cutting. Its cork backed surface will not slip off of any surface and a hole in one end of the ruler allows it to be hung from a nail or hook on your workbench. Made from corrosion-resistant stainless steel, this ruler is the ultimate durable precision tool that will last for years to come. **Features:** - 12-inch / 300 mm length - Etched dual scales - Cork non-slip back - Rust-resistant 304 stainless steel Precision you can trust, for life.

Humanize AI Pro

Rank #5 this cycle · run took 0:18

5/6 detectors passed
  • GPTZero1.00passed
  • Pangram0.00caught
  • Winston AI1.00passed
  • ZeroGPT0.55passed
  • Copyleaks1.00passed
  • Originality.ai0.98passed
Mean
0.76
Meaning
96.0
Readability
62.0
Words
1.01× 199 → 201
Show output (201 words)

**Precision With No Sacrifice: Stainless Steel Ruler** Measure once; cut once. The precision-milled stainless steel ruler is designed for anyone who doesn't accept "good enough." Every ruler is made of high-quality 304 stainless steel using CNC machining techniques, and finished with a brushed satin surface to minimize reflections and fingerprints. The markings have been deeply etched into the metal and will not wear, smear, or fade under any circumstances after years of use in the workshop, design studio, or lab. The markings on the ruler are accurate to within ±0.01 inch, with both imperial and metric scales located on opposite sides. The fine markings at 1/64" and 0.5mm increments and the large numerals allow for easy reading and quick measurements without mistakes. The perfectly flat and square-edged ruler makes an excellent straightedge tool for scribing, marking, and cutting operations. The cork backing ensures that the ruler will not slip on any surface, and a hanging hole at one end makes sure that it will be always close at hand. Durable, rust-resistant, and unexpectedly lightweight ruler is an heirloom quality tool. **Specifications:** - 12 inches / 300 mm length - Dual-scaled etching - Non-slip cork backing - Corrosion resistant 304 stainless steel

AI Humanize io

Rank #6 this cycle · run took 0:16

5/6 detectors passed
  • GPTZero1.00passed
  • Pangram0.00caught
  • Winston AI0.72passed
  • ZeroGPT1.00passed
  • Copyleaks1.00passed
  • Originality.ai0.96passed
Mean
0.78
Meaning
89.3
Readability
48.0
Words
0.93× 199 → 186
Show output (186 words)

*Accuracy Without Failures: The Steel Ruler* You should cut only after measuring. This ruler is made for designers, craftsmen, and machinists who will not accept anything less than exactly correct! Each ruler is manufactured from one steel bar out of stainless-steel alloy 304 and is decorated with unique satin brushing, providing it with resistance to glare and against leaves of fingerprints. It has permanent markings, and the numbers are cut inside instead of being printed with ink, allowing them not to disappear nor smudge while being used continuously throughout the year! The ruler can determine the length with the maximum error of ± 0.01 inch; it has the imperial scale and the metric scale on opposite sides and additional divisions on the edges. Thanks to the ultra-thin divisions of only 1/64 inch and 0.5 mm thick, it is very easy to use the ruler even when making layouts. *The features of the ruler:* - The length of 12 inches / 300 mm - Etched double scale - Non-slip cork back - Made of stainless steel alloy 304 You can trust such precision for your whole life.

Stealth Writer

Rank #8 this cycle · run took 0:10

5/6 detectors passed
  • GPTZero0.85passed
  • Pangram0.00caught
  • Winston AI1.00passed
  • ZeroGPT1.00passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Mean
0.81
Meaning
93.1
Readability
45.0
Words
1.13× 199 → 225
Show output (225 words)

The Stainless-Steel Ruler offers precision without compromise. Cut once — cut right. If you believe in "close enough" then this precision-milled stainless-steel ruler isn't for you. Manufactured from top quality CNC milled 304 stainless steel, each ruler has a satin brushed surface which is non-glare and fingerprint resistant. The graduations are etched deep, not printed, and will not fade, smudge or wear off, even after many years of usage by technicians in the shop, studio or lab. Scale markings are precise, within ±0.01", and have both a clear imperial scale and metric scale on opposite sides. Easy to work with 1/64" and 0.5 mm fine increments provide detailed layout work and readable larger digits ensure quick and efficient readings. Perfect square ground edges of the ruler provide a sure flat straight edge for scribing, marking and trimming purposes. A cork back helps the vice stick to any work surface and a hanging hole at one end will ensure that the vice is ready to grap at your bench at a moment's notice. This ruler is corrosion-resistant, economical and surprisingly light with a function that will be used far away from that of the trash right? **Features:** - 12-inch / 300 mm length - Etched dual scales - Cork non-slip back - Rust-resistant 304 stainless steel Precision that you can count on – for a lifetime.

Walter Writes

Rank #10 this cycle · run took 0:20

5/6 detectors passed
  • GPTZero1.00passed
  • Pangram0.00caught
  • Winston AI1.00passed
  • ZeroGPT1.00passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Mean
0.83
Meaning
94.6
Readability
58.0
Words
1.36× 199 → 270
Show output (270 words)

**Precision Built Into Every Tool – The Stainless Steel Ruler** Measure once, Cut Once. This stainless steel ruler is made for Makers, Machinist, Engineers, and Designers. All too often we find ourselves using tools that don’t allow us to achieve the level of accuracy that our projects deserve. We want precision without compromise. This ruler has been CNC milled from a solid piece of Premium 304 Stainless Steel. After milling, each ruler was given a Satin Brushed Finish that reduces glare and finger prints. Each graduation was laser etched into the metal. Laser etching provides the most durable markings available. They won't fade, smudge or become worn over time even when used every day in your Shop, Studio, Lab, etc. Accuracy is critical. Graduations are accurate to +-.01 inches. There are Dual Scales (Imperial and Metric) on both sides of the ruler. Imperial Scales include Fine Increments of 1/64", while the Metric Scales have fine increments of .05mm. Large Bold Numerals ensure that you read your measurements quickly and accurately. The Edges of this ruler are precisely Flat and Square Ground making them ideal as a Straight Edge for scribing, marking and trimming. A rubber backing is applied to prevent slippage on any surface. At the top of the ruler there is a hole which allows you to hang the ruler on your workbench. This ruler is Corrosion Resistant, Durable and Lightweight. It is a tool that you will pass down to future generations instead of replacing. **Features:** - Length of 12-Inches / 30cm - Dual Scales (Etched) - Rubber Non-Slip Backing - Made from Premium Grade 304 Stainless Steel

Humbot

Rank #13 this cycle · run took 0:57

5/6 detectors passed
  • GPTZero1.00passed
  • Pangram0.00caught
  • Winston AI1.00passed
  • ZeroGPT0.70passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Mean
0.78
Meaning
89.3
Readability
58.0
Words
1.37× 199 → 273
Show output (273 words)

Without sacrificing accuracy, there is a stainless-steel ruler. Precision milled from stainless steel, this ruler was created with those in mind that will not accept "close enough" (i.e. makers, machinists, engineers, and designers). Each ruler is made by CNC milling from one piece of top-quality 304 stainless steel and then given a satin brushed finish to help prevent glare and fingerprints. All of the graduation marks on the rulers are etched into the metal (not printed), making them virtually permanent. They will not fade, smudge or wear off no matter how many times you use your ruler each day in the shop, studio or lab. The markings are within ±0.01 inches of being accurate; they have both an imperial and a metric scale clearly marked on opposite sides. The small increment of 1/64" or 0.5 mm provides the ability to complete detailed layout tasks quickly and easily, and the larger numbers help to ensure that readings are made rapidly and without errors. This ruler has perfectly flat, square-ground edges which makes it an excellent straight edge for use when scribing, marking or cutting. The cork back provides support so that the ruler will not slip on any surface; also, there is a hanging hole on one side of the ruler so that you can hang it from your workbench. The ruler is made of corrosion resistant material and is strong; however, it is also very light. It can be passed down as opposed to replaced. Features: Length of 12 inches (300 mm). Double scale etching Non-slip back of cork Made from rust resistant 304 Stainless Steel Reliable results that will last a lifetime.

Super Humanizer

Rank #7 this cycle · run took 0:07

4/6 detectors passed
  • GPTZero1.00passed
  • Pangram0.00caught
  • Winston AI0.98passed
  • ZeroGPT0.32caught
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Mean
0.72
Meaning
91.1
Readability
55.0
Words
1.18× 199 → 235
Show output (235 words)

Precision Without Compromise: The Stainless-Steel Ruler Bill was a man who believed in doing things right the first time. Milled from stainless steel, the square can be used with any of our other tools for measuring, scribing, and marking out. Each ruler is CNC-milled from one solid bar of high quality 304 stainless steel and features a satin brushed surface to eliminate glare and fingerprints. The graduations are etched deep and not printed so they will never fade, smear or wear out, no matter how many years you use them in the shop, studio or lab. Every line and marking is within 0.01 inch with imperial and metric scales on opposite edges, allowing measurements in both scales to be read comfortably and easily. Fine 1/64-inch and 0.5 mm markings reduce eye-fatiguing detailed layout work, with bold numbers to facilitate easy reading. The ruler's flat, square-ground edges provide a true straightedge for scribiing, marking, and trimming. The cork backing prevents the ruler from slipping on any surface, and the hole at one end for hanging ensures the ruler is handy at your bench. Easily flipped and calibrated, corrosion-resistant, sturdy and reasonably lightweight, this is one of those tools you'll want to hand down to the next generation 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.

SupWriter

Rank #11 this cycle · run took 0:10

4/6 detectors passed
  • GPTZero0.00caught
  • Pangram0.00caught
  • Winston AI0.99passed
  • ZeroGPT0.77passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Mean
0.63
Meaning
93.7
Readability
46.0
Words
1.03× 199 → 205
Show output (205 words)

**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.

Clever AI Humanizer

Rank #4 this cycle · run took 0:26

3/6 detectors passed
  • GPTZero0.98passed
  • Pangram0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.06caught
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Mean
0.51
Meaning
95.8
Readability
80.0
Words
0.92× 199 → 184
Show output (184 words)

Precision Without Compromise: The Stainless-Steel Ruler Measure once, cut once. This precision-machined stainless-steel ruler is the perfect tool for makers, machinists, engineers, and designers who demand absolute precision from their tools. Each ruler is CNC-milled from a solid bar of premium 304 stainless steel, and features a satin brushed surface that resists reflections and fingerprints. The markings are etched into the steel for a lifetime of readability, and will never fade, smudge, or wear off. The markings are accurate to within ±0.01" and the ruler features easy to read imperial and metric scales on opposing edges with fine 1/64" divisions and 0.5 mm increments. The precisely machined edges are absolutely flat and true, making the ruler a useful straightedge for scribing, marking, and trimming. The cork backing prevents slippage on any working surface, and a hole at the end of the ruler lets you store it out of the way when not in use. Corrosion resistant, durable, and surprisingly lightweight, this ruler is a perfect addition to any workshop. Features: 12" / 300 mm length Etched markings Cork non-slip backing Rust-resistant 304 stainless-steel construction

HIX Bypass

Rank #9 this cycle · run took 0:11

3/6 detectors passed
  • GPTZero0.00caught
  • Pangram0.00caught
  • Winston AI0.96passed
  • ZeroGPT0.19caught
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Mean
0.52
Meaning
94.6
Readability
48.0
Words
1.16× 199 → 230
Show output (230 words)

Stainless-Steel Ruler: Accuracy Without Compromise Measure once, cut once. This milled stainless-steel ruler was created for makers, machinists, engineers and designers that know when good is almost not enough. CNC-milled from a single bar of high grade 304 stainless steel, each ruler is then finished with a satin brushed finish that deflects glare and resists prints. The graduations are not printed but engraved deep, so will never rub off, wear away or otherwise become illegible even after years of exposure to the rigours of day-to-day use in shop, studio or lab. In addition to the markings being ±0.01 inch accurate, scales are shown in clear imperial and metric measurements on opposite edges. Fine 1/64″ and 0.5 mm increments make detailed layout work a breeze, with easy-to-read bold numerals for fast readings free from mistake. The ruler's perfectly flat edges ground square to 90 degrees makes it a straightedge that is easy to rely on for scribing, marking, and trimming. At one end there's a hanging hole for letting it dangle close by at your workbench, and it's backed with cork to avoid slipping on any surface. This rule is corrosion-resistant, super sturdy, and floats in water - a tool you'll keep forever instead of replacing. Features: 12-inch / 300 mm length Etched dual scales Cork non-slip back Rust-resistant 304 stainless steel A Life Time of Those You can Depend On

Grammarly

Rank #14 this cycle · run took 0:09

2/6 detectors passed
  • GPTZero0.00caught
  • Pangram0.00caught
  • Winston AI0.93passed
  • ZeroGPT0.06caught
  • Copyleaks1.00passed
  • Originality.ai0.27caught
Mean
0.38
Meaning
98.6
Readability
74.0
Words
1.21× 199 → 241
Show output (241 words)

**Precision Without Compromise: The Stainless-Steel Ruler** Cut once, measure once. This stainless-steel ruler, which is precision-milled, is designed for makers, machinists, engineers, and designers who don't accept "close enough". Each ruler is made from one bar of high-quality 304 stainless steel using a CNC milling process and is then given a satin brushed finish which avoids glare and fingerprints. The graduations are etched deeply rather than printed, so that they will never fade, smudge, or wear off, even after many years of daily use in the shop, studio, or laboratory. The markings are accurate to within a tolerance of ±0.01 inch and have clear imperial and metric scales on opposite sides. The fine 1/64" and 0.5 mm divisions make detailed layout work easy, whereas the bold numerals ensure that readings are both quick and free from error. The ruler has edges that are both perfectly flat and square-ground, which makes it reliable for use as a straightedge when scribing, marking or trimming; it is fitted with a cork backing so that it won't slip on any surface and has a hole for hanging at one end to keep it within easy reach on your bench. This ruler is corrosion-resistant, durable, and rather lightweight, which is why you'll pass it on rather than replace it. **Features:** - 12-inch / 300 mm length - Etched dual scales - Cork non-slip back - Rust-resistant 304 stainless steel You can count on precision for life.

Session recording