Skip to content
October 2026 results: WriteHuman holds #1, StealthGPT jumps to #2. Read the analysis →
HumanizerBench
Not in the current cycle. Data shown is from cycle September 2026, the most recent cycle where both Grammarly and StealthBypass were tested together.

Head to head · September 2026 cycle

Grammarly vs StealthBypass

Grammarly finished 21.0 points ahead of StealthBypass in the September 2026 cycle, 60.35 to 39.38, ranking #12 against #13 in a field of 14. Grammarly scored higher on 0 of 5 detectors and 7 of 7 writing categories. StealthBypass came out ahead on GPTZero (69.3 vs 15.9), bypass rate (78.6 vs 41.1) and ZeroGPT (84.4 vs 58.0).

60.35 /100
overall score
#12 /14
rank ▼ 1
+20.97
← Grammarly leads
Detectors
0 – 5
Categories
7 – 0
Components
3 – 2
39.38 /100
overall score
#13 /14
rank -

33 prompts · Last tested · Methodology v1.2.0

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 →

Bypass rate StealthBypass by 37.5
41.1 78.6
Meaning preservation Grammarly by 46.9
86.4 39.5
Readability Grammarly by 12.0
66.1 54.1
Consistency StealthBypass by 2.0
78.7 80.7
Penalties fewer is better Grammarly by 20.0
−3.0 −23.0

Detector by detector

Share of each tool's outputs that a detector classified as human-written. StealthBypass took 5 of 5.

GPTZero StealthBypass by 53.4
15.9 69.3
Originality.ai StealthBypass by 15.1
43.4 58.5
Copyleaks StealthBypass by 4.8
60.3 65.1
Winston AI StealthBypass by 17.5
38.9 56.3
ZeroGPT StealthBypass by 26.4
58.0 84.4

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 →

Academic Essay Application Essay Blog Post Business Email Marketing Copy Discussion Board News Article Academic Essay: Grammarly 69.5 · StealthBypass 39.9 Application Essay: Grammarly 55.0 · StealthBypass 24.5 Blog Post: Grammarly 58.9 · StealthBypass 28.2 Business Email: Grammarly 44.7 · StealthBypass 26.0 Marketing Copy: Grammarly 56.5 · StealthBypass 18.9 Discussion Board: Grammarly 44.5 · StealthBypass 42.8 News Article: Grammarly 62.8 · StealthBypass 35.3
Grammarly StealthBypass Outer ring = 100
Academic Essay 6 prompts Grammarly by 29.6
69.5 39.9
Application Essay 6 prompts Grammarly by 30.5
55.0 24.5
Blog Post 6 prompts Grammarly by 30.7
58.9 28.2
Business Email 3 prompts Grammarly by 18.7
44.7 26.0
Marketing Copy 6 prompts Grammarly by 37.7
56.5 18.9
Discussion Board 3 prompts Grammarly by 1.7
44.5 42.8
News Article 3 prompts Grammarly by 27.5
62.8 35.3

Where each one wins

Every measure above that one tool won outright, largest margin first within each group.

Grammarly

10 wins
  • Penalties Score −3.0 vs −23.0
  • Meaning preservation Score 86.4 vs 39.5
  • Readability Score 66.1 vs 54.1
  • Marketing Copy Category 56.5 vs 18.9
  • Blog Post Category 58.9 vs 28.2
  • Application Essay Category 55.0 vs 24.5
  • Academic Essay Category 69.5 vs 39.9
  • News Article Category 62.8 vs 35.3
  • Business Email Category 44.7 vs 26.0
  • Discussion Board Category 44.5 vs 42.8

StealthBypass

7 wins
  • Bypass rate Score 78.6 vs 41.1
  • Consistency Score 80.7 vs 78.7
  • GPTZero Detector 69.3 vs 15.9
  • ZeroGPT Detector 84.4 vs 58.0
  • Winston AI Detector 56.3 vs 38.9
  • Originality.ai Detector 58.5 vs 43.4
  • Copyleaks Detector 65.1 vs 60.3

Same prompt, both outputs

Both tools were given this AI-written passage in the September 2026 cycle. Below it is what each one returned. This prompt was picked by a fixed rule, not by how the tools scored.

Listicle Blog · Blog Post · written by Gemini 3.5 Flash · 476 words

**10 Tips for Houseplants for Low-Light Apartments**

Living in a cozy apartment with windows that face... well, another brick wall? We’ve all been there. It’s easy to get major plant envy scroll-deep on Instagram, looking at sun-drenched urban jungles. But don’t throw in the trowel just yet! You don't need a greenhouse to be a successful plant parent.

Here are 10 super chill tips to help your leafy roommates thrive in your low-light sanctuary.

### 1. Pick the Right Crew First things first: leave the succulents at the nursery. Instead, go for low-light legends. Snake plants, ZZ plants, cast-iron plants, and pothos are practically indestructible and actually prefer the dim life.

### 2. Put Them on a Water Diet Less light means your plants take longer to "drink" their water. Before you grab the watering can, stick your finger two inches into the soil. If it’s wet, step away. Overwatering is the number one killer of low-light plants.

### 3. Dust Those Leaves When light is scarce, your plants need to absorb every single drop they can get. Dust acting as a shield doesn't help. Give their leaves a gentle wipe with a damp cloth every couple of weeks so they can photosynthesize like bosses.

### 4. Mirror, Mirror on the Wall Want to double your light without buying a new lamp? Hang a mirror opposite your window. It bounces the natural light around the room, giving your plants a sneaky little boost.

### 5. Keep ‘Em Clean and Yellow-Free If a leaf turns yellow or brown, snip it off. Your plant is wasting precious energy trying to save a dying leaf. Let it focus its limited resources on the healthy parts!

### 6. Rotate for Even Tans Plants will naturally stretch toward whatever light is available (a dramatic look called etiolation). Give your pots a quarter-turn every week so they grow nice and symmetrical, rather than doing a weird lean.

### 7. Think White and Bright If you’re repainting or buying pots, opt for light colors. White, cream, or pastel pots and walls reflect light, helping to brighten up those dim corners.

### 8. Fake It with Grow Lights No natural light? No problem. You don't need ugly industrial setups anymore. You can buy stylish LED grow bulbs that fit right into your favorite desk lamps. Your plants won’t know the difference!

### 9. Ditch the Heavy Fertilizer Plants in low light grow much slower, meaning they don’t need much food. Only fertilize once or twice during the spring and summer, and skip it entirely in the winter.

### 10. Group Your Greenies Grouping your plants together doesn't just look cute; it actually creates a microclimate with higher humidity. Plants "breathe" out moisture, so keeping them close helps prevent crispy, brown edges.

See? You don’t need a sunroom to have a green thumb. Happy planting!

Show the full input

724 words (input 476)

**10 Tips for Houseplants for Low-Light Apartments**

There's nothing special about living in an apartment with windows that just look at another brick wall—we've all been in that situation. It's simple to develop a strong desire for plants after scrolling far down on Instagram, where you see lush urban gardens getting plenty of sunlight. Yet don't give up on planting right away! It's possible to be a successful plant parent without having a greenhouse.

Here are 10 really relaxed tips that will help your leafy plants flourish in your low-light area.

### 1. Select the Appropriate Team The first point is to keep the succulents at the nursery and instead choose the low-light legends. Snake plants, ZZ plants, cast-iron plants, and pothos are almost entirely indestructible and in fact prefer dim conditions.

### 2. Put Them on a Water Diet

Cut back on how much you water your plants. Too much water can hurt their roots and slow their growth. Let the top inch of soil dry out before you water again. This helps the roots get stronger and keeps the plant healthy. Check the soil with your finger to see if it is dry before adding more water. If there is less light, your plants will take longer to absorb their water. Before you take the watering can, insert your finger into the soil at a depth of two inches. If the soil is wet, then don't water it because overwatering is the leading cause of death for plants in low light.

### 3. Clean the Leaves When there is little light, your plants need to make use of every bit of it they can obtain; dust acting as a shield is of no help. Every few weeks wipe their leaves gently with a damp cloth so that they can photosynthesise like bosses.

### 4. The mirror on the wall If you want to double the amount of light in your room without having to buy a new lamp, then hang a mirror directly opposite your window. The mirror will reflect the natural light into the room and give your plants a quiet little advantage.

### 5. Keep Them Clean and Free from Yellow Remove any leaf that has turned yellow or brown since the plant is wasting valuable energy in an attempt to save a dying leaf and should instead concentrate its limited resources on the healthy parts!

### 6. Rotate for Even Tans

Move your body regularly while tanning. This helps all areas get the same amount of sun. Change your position every 15 to 30 minutes. This way, you lower the chance of getting tan lines or uneven color. Plants have a natural tendency to grow towards any light that is available (this results in a dramatic effect known as etiolation). If you want your plants to grow nicely and remain symmetrical rather than lean in an odd direction, give your pots a quarter-turn each week.

### 7. Think white and bright When you are having your pots repainted or purchasing new ones, choose light colours; pots and walls that are white, cream or pastel in colour reflect light and thus help to brighten up the dull areas.

### 8. Pretend Using Grow Lights If there's no natural light, don't worry about it—you no longer have to make do with unattractive industrial equipment and can instead purchase elegant LED grow bulbs that fit perfectly into your preferred desk lamps; your plants will never notice the difference!

### 9. Give up the heavy fertilizer Plants growing in low light do so much more slowly and therefore do not require much food; you should only feed them once or twice during spring and summer and omit fertilizing altogether in the winter.

### 10. Group Your Greenies

Keep your green vegetables together in your fridge. When you store them in one spot, you can find them faster and they stay fresher. This also helps you use everything before it goes bad. You will waste less food and save money. Putting your plants together not only looks nice but also results in a microclimate with greater humidity since plants give off moisture and having them close together helps to prevent the edges from becoming crispy and brown.

Look here—you don't need a sunroom to have a green thumb. Go ahead and plant some things!

Show the full output
  • GPTZero1.00passed
  • Winston AI1.00passed
  • ZeroGPT0.49caught
  • Copyleaks1.00passed
  • Originality.ai0.60passed

Passed 4 of 5 detectors.

Every Grammarly run in September 2026 →

563 words (input 476)

Here are 10 Tips for houseplants for low-light apartments1Living in a cosy apartment with windows that face… well, another brick wall? We have all been there. It is easy to get plant envy through our instagram feed when we’re flicking through beautiful urban jungles in sun soaked apartments. But before you give up the ghost, throw in your trowel and throw your leafy dreams in the bin, rest assured that you do not have to own a greenhouse to become a happy plant parent.Here are 10 super chill tips for looking after your plants in a low-light home:1 Pick the Right CrewForget those pretty little succulents you saw at the shop; they will not survive in an apartment that is a bit dark. Choose plants that can tolerate the dim life such asSnake Plants, ZZ Plants,Cast-Iron PlantsandPothos. These plants are notoriously tough and can basically not be killed.2Put them on a water dietDue to the limited light they receive, low-light plants take a lot longer to “drink” up the water they are given. Stick your finger about 2 inches down into the soil to test. If you feel moisture, it is best to back away slowly and refrain from watering. Overwatering is what usually kills them!3Dust those leavesIf there is one thing that low light plants do not like is the accumulation of dust. When they do not get much sunlight to photosynthesise, the last thing they need is anything blocking the light from getting to their leaves. Give them a gentle clean every week or two.4Mirror, Mirror on the WallWant to increase the amount of natural light in your apartment? Hang up a mirror directly opposite of the window; you’ll be surprised how much the natural light can bounce around.5Keep ‘Em Clean and Yellow-FreeA yellow or brown leaf on any of your plants should be clipped off and discarded. The plant is essentially wasting energy on this dying leaf and it should be focusing on those that are healthy instead.6Rotate for Even TansPlants in low light apartments often stretch and contort their bodies in the direction of any light, a phenomena called etiolation. Rotate each of your plant pots a quarter-turn each week in order to encourage healthy and even growth.7Think White and BrightWhen buying or re-painting walls and pots, always opt for white or light colours. These colours reflect the light and will help brighten up any dark corners in the room.8Fake It with Grow LightsThere are now very attractive grow lamps available to buy that you can pop in to your everyday desk lamps so you are no longer resigned to ugliness if your home does not get enough natural light. Your plants will not even notice.9Ditch the Heavy FertilizerPlants do not grow as much when they do not have much light so they do not need a huge amount of fertiliser. Only fertilise them between one and two times a year and then only during the spring and summertime; do not fertilise in the winter time.10Group Your GreeniesPutting plants together is not only aesthetically pleasing; it creates a microclimate that increases the level of humidity in the room. When plants ‘breathe’ they release moisture, so grouping them together can prevent your plants from having dried out or brown tips.So there you have it, no excuses, you don’t need a sun-room in order to have a green thumb! Happy planting!

Show the full output
  • GPTZero1.00passed
  • Winston AI1.00passed
  • ZeroGPT0.97passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed

Passed 5 of 5 detectors.

Every StealthBypass run in September 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.

Questions people ask

Is Grammarly better than StealthBypass?

Grammarly finished 21.0 points ahead of StealthBypass in the September 2026 cycle, 60.35 to 39.38, ranking #12 against #13 in a field of 14. Grammarly scored higher on 0 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, Grammarly or StealthBypass?

StealthBypass posted the higher bypass rate, 78.6 vs 41.1, and scored higher on 5 of 5 detectors. StealthBypass led on GPTZero, Originality.ai, Copyleaks, Winston AI and ZeroGPT.

Do Grammarly and StealthBypass keep the original meaning?

Grammarly preserved meaning better, 86.4 vs 39.5 on our 0–100 similarity scale. On readability, Grammarly rated higher, 66.1 vs 54.1. Penalties this cycle: Grammarly −3.0, StealthBypass −23.0.