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HumanizerBench

← August 2026 prompts

Product Desc · Claude Sonnet 5

Marketing Copy · written by Claude Sonnet 5 · 199 words · prompt product_desc

8
passed at least 4 detectors
9
failed at least one detector
12
tools tested on this prompt
ZeroGPT
hardest detector, caught 9 of 12

Input passage

Generated by Claude Sonnet 5; this exact text was pasted into every humanizer below.

# Stainless-Steel Insulated Water Bottle Stay refreshed wherever your day takes you with this premium stainless-steel insulated water bottle, engineered for performance and built to last. Crafted from high-grade 18/8 food-safe stainless steel, this bottle combines durability with sleek, modern style—perfect for the gym, office, hiking trail, or daily commute. Featuring advanced double-wall vacuum insulation technology, it keeps beverages ice-cold for up to 24 hours or steaming hot for up to 12 hours, so your drink stays exactly how you like it, hour after hour. The powder-coated exterior offers a comfortable, non-slip grip while resisting condensation—no more sweaty bottles ruining your bag or desk. Designed with convenience in mind, the leak-proof lid ensures worry-free transport, while the wide-mouth opening makes it easy to add ice cubes, fruit infusions, or your favorite electrolyte mix. The compact, ergonomic design fits seamlessly into most cup holders and backpack pockets. Eco-conscious and reusable, this bottle helps reduce single-use plastic waste while saving you money over time. Rust-resistant, BPA-free, and built with a lifetime of adventures in mind, it's the perfect companion for athletes, students, professionals, and outdoor enthusiasts alike. Available in multiple colors and sizes to match your personal style and hydration needs.

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.

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 5 detectors scored it.

HIX Bypass

Rank #4 this cycle · run took 0:15

5/5 detectors passed
  • GPTZero0.76passed
  • Winston AI1.00passed
  • ZeroGPT0.67passed
  • Copyleaks1.00passed
  • Originality.ai0.99passed
Median
0.99
Meaning
91.9
Readability
48.0
Words
1.10× 199 → 219
Show output (219 words)

Stainless-Steel Insulated Water Bottle Constructed for durability, precision performance and more convenient on-the-go hydration. Made from 18/8 food-grade stainless steel, this bottle gives you a sleek and modern look while ensuring that it is strong enough for the gym, office or hiking trail—and everyday commuting. Using sophisticated double-wall vacuum insulation technology, it keeps your beverage ice-cold up to 24 hours or steaming hot for up to 12 hours so that you can always enjoy your drink as per its taste hour after hour. You lose the condensation on this one, no machine smoothie leaks ruining your bag or desk. The leak-proof lid is designed for on-the-go hydration, and with the wide-mouth opening, you will have no trouble inserting ice cubes directly into your bottle-perfect if you're looking to make fruit infusions or adding your own electrolyte mix. Stays in your cup holder or stows neatly away in the pocket of a backpack with its compact, ergonomic design. More sustainable and reusable than your favourite single-use water bottle, this product helps eliminate plastic waste from landfills while saving you money in the long run. Rust-resistant, BPA-free and designed for decades of use — this is the hydration companion you need whether you're an athlete on-the-go or student in a lecture hall. Color and SizesYou can choose to fit your needs.

Undetectable.ai

Rank #8 this cycle · run took 0:21

5/5 detectors passed
  • GPTZero1.00passed
  • Winston AI1.00passed
  • ZeroGPT0.81passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Median
1.00
Meaning
92.9
Readability
45.0
Words
1.73× 199 → 345

Output is more than 1.4× the input length, penalized as length inflation.

Show output (345 words)

# Stainless-Steel Insulated Water Bottle This stainless steel insulated water bottle is designed to keep you hydrated for hours on end. This water bottle is made from high quality 18/8 food safe stainless steel that is not only durable, but also stylish enough to bring to the gym, to and from work, on long hikes or just to throw in your bag for daily use on the go. The double-walled vacuum insulated interior keeps drinks cold for up to 24 hours and hot for 12 hours. A durable powder coat on the exterior is non-scratches and non-slip for easy use and keeps the product looking new. The stainless steel insulated water bottle does not have condensation on the outside, unlike some of the plastic insulated water bottles. This makes it perfect for travel and to take to work by carrying it in a bag. Leak-proof lid: Leak-proof and easy to use while on the move. This insulated bottle has a leak-proof lid which has been designed to travel with you. Whether you are walking, driving or in the gym the leak-proof lid is perfect for taking your bottle with you. Large opening: Large opening for easy filling of ice, cut up fresh fruit or your favorite sports drink. The bottle has a large opening that is ideal for adding ice or for filling with a sports drink such as Gatorade or powerade. Compact and ergonomic design: The bottle is designed to be compact and ergonomic making it easy to hold and placing in cup holders in cars and also in the pockets of most backpacks. This eco friendly stainless steel water bottle is designed for life on the go! It is rust resistant, BPA free and is ideal for the athletes, students, health conscious professionals as well as well as the outdoor enthusiasts. Save money in the long run by not having to continuously purchase bottled water. Reuse your bottle over and over again. This item is available in many different colors to suit your style, and a range of sizes to suit your needs.

Walter Writes

Rank #9 this cycle · run took 0:33

5/5 detectors passed
  • GPTZero1.00passed
  • Winston AI1.00passed
  • ZeroGPT0.87passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Median
1.00
Meaning
84.8
Readability
72.0
Words
1.03× 199 → 204
Show output (204 words)

The Stainless Steel Water Bottle is designed to help keep you hydrated throughout the day. The bottle is made out of 18/8 food safe stainless steel that will be durable enough for long term use as well as have an elegant look. This is a great item whether you are at work, going on a hike, or just running errands around town. This bottle has a vacuum insulated body which allows cold drinks to remain cold for 24 hours and warm drinks to remain warm for 12 hours. It also has a unique non slip coating on the outside of the bottle to prevent condensation from forming. When drinking from this bottle there is no need to worry about spills because it comes equipped with a leak proof lid. It also has a large mouth opening making it very easy to put in ice cubes or even fruits. The overall shape of the bottle is very compact and fits perfectly into almost every cup holder and back pack pocket. In addition to being able to take this anywhere, it is also eco-friendly and can be reused many times. Over time, using this bottle instead of disposable cups and water bottles could save consumers money.

WriteHuman

Rank #1 this cycle · run took 0:21

4/5 detectors passed
  • GPTZero1.00passed
  • Winston AI1.00passed
  • ZeroGPT0.39caught
  • Copyleaks1.00passed
  • Originality.ai0.98passed
Median
1.00
Meaning
92.6
Readability
68.0
Words
0.80× 199 → 160
Show output (160 words)

# Stainless-Steel Insulated Water Bottle Bring this insulated water bottle with you whenever your day requires a change in scenery. With high-grade, 18/8 food-safe stainless steel, this water bottle looks good while withstanding the test of time. As it fits in everywhere from the office to the trail to the car, the design is sleek, and it fits with your everyday style. This bottle uses the latest technology with double-wall vacuum insulation to keep even the hottest of drinks hot for 12 hours and to keep cool drinks cold for 24 hours. The powder-coating on the outside provides a non-slip, comfortable grip and prevents condensation from forming on the outside of the bottle. This bottle encourages a healthy lifestyle and helps protect the planet. It reduces the amount of single-use plastic by promoting reusable drinking. With a variety of colors, sizes and a bunch of features designed for your convenience, this water bottle is sure to become your daily companion.

Humanize AI Pro

Rank #2 this cycle · run took 0:16

4/5 detectors passed
  • GPTZero1.00passed
  • Winston AI1.00passed
  • ZeroGPT0.35caught
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Median
1.00
Meaning
93.4
Readability
58.0
Words
0.94× 199 → 188
Show output (188 words)

# Stainless-Steel Insulated Water Bottle Stay hydrated no matter where you go during the day with this high-quality stainless-steel insulated water bottle. This bottle is made of high-quality food-grade stainless steel that provides it with durability and elegance making it suitable for use in gym, at work, on hikes, and during commute. The use of double-wall vacuum insulation makes sure that cold drinks stay cold for up to 24 hours and that the hot ones remain hot for up to 12 hours. The powder-coating ensures that the exterior of the water bottle is resistant to sweat and provides you with comfortable touch while using it. The design includes a leak-proof lid so you can carry this bottle everywhere without worrying about any spills and leaks. Moreover, the wide mouth of the bottle allows adding ice cubes and fruit infusions without much hassle. Eco-friendly, it will allow you to save your money by not buying plastic bottles. It is rust-free and does not contain BPA. Moreover, its sturdy construction will make sure that you are using this bottle in many years to come. Available in multiple sizes and colors!

AI Humanize io

Rank #6 this cycle · run took 0:18

4/5 detectors passed
  • GPTZero1.00passed
  • Winston AI1.00passed
  • ZeroGPT0.29caught
  • Copyleaks1.00passed
  • Originality.ai0.99passed
Median
1.00
Meaning
90.9
Readability
48.0
Words
0.91× 199 → 181
Show output (181 words)

# Insulated Water Bottle Made of Stainless Steel Keep yourself hydrated any time with this high-quality insulated water bottle made of stainless steel. Made of high-quality 18/8 food-safe stainless steel, this bottle combines reliability with a modern design suitable for exercising at the gym, working in an office, walking on the hiking path, and doing day-to-day commuting. A double-wall vacuum insulation technology keeps the beverages cool for up to 24 hours or hot for up to 12 hours, thus making sure that your drink remains to taste just how you like it. The powder-coated surface of the bottle keeps it cool and puts icing on the cake by making it have a non-slip surface and not forming moisture on it. The well-designed leak-proof lid allows you to take it anywhere in peace of mind, and the wide mouth technology makes it easy for you to fill the bottle with ice cubes, fruits, or electrolytes. An ergonomic design allows for easy storage in most cup holders and pockets. With its help, you can eliminate plastic waste while saving a lot of money.

Phrasly

Rank #7 this cycle · run took 0:26

4/5 detectors passed
  • GPTZero1.00passed
  • Winston AI1.00passed
  • ZeroGPT0.34caught
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Median
1.00
Meaning
84.5
Readability
62.0
Words
1.01× 199 → 201
Show output (201 words)

PRACTICAL STAINLESS STEEL WATER BOTTL Drink water anywhere you go using this durable insulated stainless steel water bottle. Made of high quality 18/8 food-grade stainless steel, it's built to last while looking sharp and stylish. Whether you're at the gym, office, hiking up a mountain or commuting to work, stainless steel bottles are an ideal way to stay hydrated. This vacuum insulated water bottle keeps drinks cold for 24 hours and hot for 12 hours. Enjoy your beverage how you like it, all day long! Our powder coated finish gives you a comfortable grip and stays fog-free. Say goodbye to sweaty water bottles. Our leakproof lid design lets you take this bottle everywhere with confidence. Plus, with its wide-mouth design, you can add ice cubes, fruits for infusion or your favorite electrolyte powder. It's compact and fits perfectly in most cup holders and backpacks. Stainless steel water bottles are reusable, environmentally friendly, and save you money in the long run. They don't rust and are generally BPA free. Enjoy your water bottle for a lifetime of adventures. Whether you're a runner, camper, student or office worker everyone will benefit from staying hydrated using a stainless steel bottle. Choose from available colors.

StealthGPT

Rank #12 this cycle · run took 0:20

4/5 detectors passed
  • GPTZero1.00passed
  • Winston AI1.00passed
  • ZeroGPT0.40caught
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Median
1.00
Meaning
88.3
Readability
55.0
Words
0.91× 199 → 181
Show output (181 words)

Stainless-Steel Insulated Water Bottle This stainless steel insulated water bottle will keep your drinks cold or hot all day long. This water bottle is made of high quality 18/8 food grade stainless steel. It is insulated and will keep your drinks ice cold for 24 hours or hot for 12 hours. The outside is coated and feels nice and smooth to hold. The bottle doesn't sweat on the outside so you don't have to worry about a wet bottle in your bag or on your desk. The bottle has a leak proof lid and wide mouth which makes it easy to put ice, fruit or any other drink mixes inside the bottle. The bottle will fit in most cup holders and backpack pockets. The bottle is eco friendly because it can be reused over and over again so you don't have to buy bottled water or sodas all the time. The bottle is rust free and BPA free. The bottle is the perfect size for the gym, workout, hiking, school, work, travel or anywhere else you need a reliable water bottle.

Stealth Writer

Rank #3 this cycle · run took 0:28

3/5 detectors passed
  • GPTZero0.00caught
  • Winston AI1.00passed
  • ZeroGPT0.06caught
  • Copyleaks1.00passed
  • Originality.ai0.82passed
Median
0.82
Meaning
89.8
Readability
52.0
Words
1.19× 199 → 236
Show output (236 words)

A stainless-steel water bottle designed with a layer of insulation between the steel and the lid. Whether you're exploring the great outdoors, lounging at your favorite coffee shop, or traveling around, this high-quality stainless steel, insulated water bottle will keep you refreshed, no matter where your day leads. Made from premium 18/8 drill quality food-safe stainless steel, it is built to last and comes with a fashionable and contemporary design – ideal for the gym, office, hiking trail or everyday use. With ultra double-wall vacuum insulation technology, it can help you enjoy an ice-cold beverage for up to 24 hours or steaming hot for up to 12 hours, making sure your drink doesn't get too cold or too hot, hour-by-hour. Its powder-coated exterior provides a comfortable, non-slip feel and won't get condensation on it; no sweaty bottles spoil your bag or desk. The leak-proof lid lets you transport with ease and the large mouth allows you to easy include ice cubes, fruit infusions or your favorite electrolyte mix. Compact and ergonomic design fits into most cup holders and backpack pockets. This bottle is eco-friendly and reusable, allowing you to cut down on single-use plastics and save money in the long run. Rust proof, BPA-free and designed to be tackled over miles of adventures, it's perfect for athletes, students, professionals, and outdoor enthusiasts alike. Come in various colours and sizes to suit your style and hydration requirements.

Humbot

Rank #5 this cycle · run took 0:37

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.79passed
  • ZeroGPT0.35caught
  • Copyleaks1.00passed
  • Originality.ai0.02caught
Median
0.35
Meaning
91.9
Readability
45.0
Words
0.95× 199 → 189
Show output (189 words)

Stainless-Steel Insulated Water Bottle Well, the luxury stainless steel insulated water bottle you've grown to love is good to go wherever your days take you — designed for performance and crafted with long-lasting capability. Made with premium 18/8 food-grade stainless steel, this bottle brings together durability and sharp modern style for the gym, office, hiking trail or your daily commute. High-quality double-wall vacuum insulation technology keeps drinks chilled for up to 24 hours or piping hot for up to 12. Powder-coating on the outside provides a comfortable, friction-holding grip barrier and resists condensation—goodbye sweaty bottle ruining your bag/desk. This design has a leak-proof lid for hassle-free transport, and a wide-mouth opening to fill it with ice cubes, fruit-infused drinks, ground powders or electrolytes. The portable, space-saving design fits in most cup holders and backpack pockets. It is eco-friendly, easy to clean, and reusable bottle which saves you money due to less single-use plastic waste. This innovatively designed bottle is rust-resistant, BPA-free and built for endless adventures, making it a great choice for students, athletes, professionals or outdoor lovers. Customizable in colors and sizes for all your hydration style needs.

Super Humanizer

Rank #10 this cycle · run took 0:13

0/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.24caught
  • Copyleaks0.00caught
  • Originality.ai0.00caught
Median
0.00
Meaning
91.8
Readability
72.0
Words
1.10× 199 → 218
Show output (218 words)

# Reusable 18/8 Stainless-Steel Insulated Water Bottle Stay hydrated wherever you go with this top-of-the-line stainless-steel insulated water bottle. Made with high-quality 18/8 stainless-steel, it's eco-friendly, durable, and ideal for all your adventures! Whether you're at the gym, in the office, hiking, biking, or just enjoying a day outdoors, this bottle is your ultimate hydration companion. It's engineered with advanced double-wall vacuum insulation to keep your drinks ice-cold for up to 24 hours or steaming hot for up to 12 hours. It's coated with powder that makes it sweat-free and provides a non-slip grip for effortless handling. This bottle can withstand the tests of time, rust, and chips. The bottle comes with a leak-proof lid so it can be placed in a bag without worrying about spillage. It has a wide mouth that makes it easy to clean, fill up with your favorite beverages, and add ice, fruit, or other additives to it. It's also compact and ergonomic for ease of portability, fitting perfectly in most cup holders and backpack pockets. This reusable bottle saves you money and reduces the need for disposable plastic bottles. It’s BPA-free and built to last for a lifetime. It’s the ideal companion for students, athletes, and outdoor enthusiasts, and comes in several colors and sizes to fit all your needs and preferences.

Grammarly

Rank #11 this cycle · run took 0:11

0/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.00caught
  • Copyleaks0.00caught
  • Originality.ai0.00caught
Median
0.00
Meaning
98.7
Readability
68.0
Words
1.03× 199 → 205
Show output (205 words)

# Stainless-Steel Insulated Water Bottle Stay refreshed wherever your day takes you with this premium stainless-steel insulated water bottle. It is built to perform and last. Made from high-grade 18/8 food-safe stainless steel, this bottle blends durability with a sleek, modern style. It is perfect for the gym, office, hiking trail, or daily commute. With double-wall vacuum insulation, it keeps drinks ice-cold for up to 24 hours or piping hot for up to 12 hours. Your beverage will stay just the way you like it, hour after hour. The powder-coated exterior gives you a comfortable, non-slip grip while preventing condensation. No more sweaty bottles ruining your bag or desk. Designed for convenience, the leak-proof lid ensures you can transport it without worry. The wide-mouth opening makes it easy to add ice cubes, fruit, or your favorite electrolyte mix. The compact, ergonomic design fits easily into most cup holders and backpack pockets. This bottle is eco-friendly and reusable, helping to reduce single-use plastic waste while saving you money over time. It is rust-resistant, BPA-free, and built for a lifetime of adventures. It’s the perfect companion for athletes, students, professionals, and outdoor lovers. Available in various colors and sizes to suit your personal style and hydration needs.

Session recording