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HumanizerBench

← August 2026 prompts

Business Email · Gemini 3.5 Flash

Business Email · written by Gemini 3.5 Flash · 236 words · prompt business_email

1
passed at least 4 detectors
12
failed at least one detector
12
tools tested on this prompt
Winston AI
hardest detector, caught 11 of 12

Input passage

Generated by Gemini 3.5 Flash; this exact text was pasted into every humanizer below.

Subject: Exciting News: Transitioning to a Four-Day Work Week Next Quarter! Dear Team, I am thrilled to share a major milestone for our company. Starting next quarter on [Date], we will officially transition to a four-day work week. Our new schedule will run Monday through Thursday, with Fridays off. Crucially, your compensation, benefits, and overall expectations for high-quality output will remain exactly the same. We are not asking you to squeeze 40 hours of work into four days; rather, we are focusing on working smarter, not longer. This decision stems from our deep commitment to your well-being and work-life balance. We believe that a rested, energized team is a creative and productive one. By giving everyone a consistent three-day weekend, we want to ensure you have ample time for family, hobbies, rest, and personal passion projects. To make this transition successful, we will be adapting how we work. Over the coming weeks, we will share guidelines on optimizing our schedules, streamlining meetings, and prioritizing deep-work blocks. We will also host a Q&A session this Thursday at [Time] to discuss logistics and answer any questions you might have. This is a collaborative journey, and we will be seeking your feedback regularly as we adjust. Thank you for your continued dedication and hard work, which has made this exciting step possible. Here is to a more balanced, productive, and fulfilling future together! Warm regards, [Your Name] [Your Title]

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.

WriteHuman

Rank #1 this cycle · run took 0:19

4/5 detectors passed
  • GPTZero0.71passed
  • Winston AI0.95passed
  • ZeroGPT1.00passed
  • Copyleaks0.00caught
  • Originality.ai1.00passed
Median
0.95
Meaning
90.4
Readability
48.0
Words
1.19× 236 → 281
Show output (281 words)

This update has great news - Company-wide transition to the Four-day Work Week Starting Fourth Quarter ([Date]) Dear Team, After serious consideration for the wellbeing of all employees, we are proud to say our company will officially be moving to a four-day work week starting this quarter! This means every employee will be spending their long hard-earned weekends on us! It has our complete support! Once again, we emphasize zero changes will be experienced with pay and benefits. Expectations of a high level of work output remains, however we will prefer a smart, and efficient approach instead of a long-work week. Plan to keep a realistic schedule to avoid the stress of a 4-day work week to cram in 5 days of work. Considering your happiness and wellbeing is our utmost concern, we want you to know we are aware of the positive correlation of a rejuvenated team with a higher level of creativity and productivity. This new schedule requires a different approach to the way we work. In the weeks leading up to this event, expect some changes on your calendar from the elimination of certain meetings, migrating meetings to certain times, and more time for uninterrupted work. Deep work will be the main focus. Come prepared with questions on your available time this Thursday at [Time]. As much as this is a company-wide change, we are most interested in your feedback to how your work impacts all employees. Again, the support of the workers is appreciated as this brings us to a better place. We hope this new approach to work leaves you energized and wanting to continue to give your best to Allied. Best, [Your Name] [Your Title]

AI Humanize io

Rank #6 this cycle · run took 0:28

3/5 detectors passed
  • GPTZero1.00passed
  • Winston AI0.01caught
  • ZeroGPT0.83passed
  • Copyleaks0.00caught
  • Originality.ai0.99passed
Median
0.83
Meaning
90.5
Readability
62.0
Words
1.03× 236 → 243
Show output (243 words)

Subject: Wonderful News: Launch of a Four-Day Work Week in the Next Quarter! Dear Team, With great excitement, I would like to share some good news concerning our company's development. Starting from [Date] next quarter, we will implement a four-day work week. According to the new plan, employees will work from Monday to Thursday and will have Fridays off. Most importantly, there will be no change in their salaries, benefits or outptut expectations. We are not going to make our employees work a standard number of hours in just four days. We prefer to preach working smart instead of working hard. This is a great decision, which confirms the commitment of our company to its employees and their well-being. We believe that a good rest of employees contributes to their creativity and productivity. Hope that with three days off employees will be able to spend more time with their close ones, enjoy time doing their hobbies, and relax. In order to achieve successful implementation of the new policy, we will have to change our work methods significantly and get used to new ways of work. During the coming weeks, we will be sharing information on how to get organized, make meetings more effective and create productive blocks of time during the day. Also, we will hold a question-and-answer session on Wednesday at [Time] to clarify any pressing issues. Thank you for being with us on this exciting journey and giving us your feedback.

Phrasly

Rank #7 this cycle · run took 0:20

3/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.01caught
  • ZeroGPT0.65passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Median
0.65
Meaning
93.1
Readability
78.0
Words
1.13× 236 → 267
Show output (267 words)

Hey Team! Some BIG news! Next quarter, on [Date], we will be officially switching to a four-day work week. Our workdays will be Monday thru Thursday with Fridays as your day off. There will be no change to your pay or benefits… nor should there be any change to your expected quality of work. We aren't asking you to just jam 40 hours into 4 days. We want to work smarter, not longer. This is a decision that comes from wanting what's best for you. When you're well-rested and have a good balance, you show up excited to create wonderful things. By ensuring you always have three full days of weekend, we hope to provide you with more time to spend with family and friends, pick up a hobby, rest and recharge, or work on something that passions you. Of course, this new schedule will require us to adapt how we work. In the next few weeks we will provide guidelines for restructuring our schedules to make the most of our time. We'll go over how to run effective and efficient meetings, as well as how to make sure you always have blocks of time to deep dive into projects. We will have a meeting this Thursday at [Time] to go over the logistics of this change and take any questions you may have. This is going to be a team effort and we look forward to hearing your thoughts as we continue moving forward. Thank you for all of your continued hard work, we could not make this happen without you. Cheers! [Your Name] [Your Title]

Humanize AI Pro

Rank #2 this cycle · run took 0:14

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.01caught
  • ZeroGPT0.93passed
  • Copyleaks0.00caught
  • Originality.ai0.99passed
Median
0.01
Meaning
89.5
Readability
55.0
Words
0.96× 236 → 227
Show output (227 words)

The Subject: Good News: A New Era – Four Days in Office Starts Next Quarter! Dear Team, As your team leader, I am glad to announce an important development for our organization. Starting next quarter from [Date] we will be officially starting a four-days workweek. Our new schedule will start Monday to Thursday and the fifth day, Friday, will be our day off. Please note that your salary, perks, and expectations for high productivity will not change at all – we will ask you to put 40 working hours, but with different approach to this period. This decision has been made because of our devotion to you and your well-being. Working for long periods without rest is not a healthy practice. Giving you a three-day rest period we hope you will spend enough time with your families, pursuing hobbies and passions and recovering. In order to implement this plan successfully we will work to adjust the way of working. In the upcoming weeks we will inform you about tips for making workdays more efficient and organizing your time productively. There will be a Question & Answer session on this Thursday at [Time] and we will talk to you about it in details. Thanks for your loyalty and hard work and I hope this news will cheer up everyone! Wishing you happiness and prosperity, [Your Name] [Your Position]

Humbot

Rank #5 this cycle · run took 0:20

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.84passed
  • Copyleaks0.00caught
  • Originality.ai0.76passed
Median
0.00
Meaning
94.2
Readability
55.0
Words
1.11× 236 → 261
Show output (261 words)

Date: Dec 14, 2023 at 2:19 AM Subject: Announcement: Transitioning to a four-day work week next quarter! Dear Team, I am very excited to announce a huge moment for our company. Next quarter on [Date] we will be formally moving to the four-day work week. A Friday off, work Monday through Thursday — that's our new schedule. Most importantly, your pay, benefits and general expectations around producing high quality work will remain completely unchanged. We are not begging you to fit, 40 hours of work in four days, we want to work smarter (not longer). This decision comes from our strong belief in the importance of your well-being and work-life balance. We also believe that creative teams do the best work when they are rested and energized. With a three-day weekend every week for everybody, we want to make sure you have plenty of time to spend with family and doing hobbies and taking care of yourself and working on passion projects. This transition will require us to change how we operate. In the next few weeks we will provide some directives on scheduling wisely, simplifying our meetings and making sure to secure time blocks for deep-work. This Thursday (? Time) we will do a short Q&A for logistics and any other questions too. As we iterate, this is a collaborative journey and we will be asking for your feedback often. Thanks for your continued commitment & hard-work that has made this exciting step possible! Here is to a functional, focused, and meaningful future together! Warm regards, [Your Name] [Your Title]

Undetectable.ai

Rank #8 this cycle · run took 0:25

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.87passed
  • Copyleaks0.00caught
  • Originality.ai0.99passed
Median
0.00
Meaning
96.4
Readability
68.0
Words
1.33× 236 → 314
Show output (314 words)

Subject: Exciting News: Transitioning to a Four-Day Work Week Next Quarter! Dear Team, Great News! We will be transitioning to a 4 day work week for next quarter with the 4 days being Monday thru Thursday with Friday’s off. You will continue to receive the same compensation, be entitled to the same benefits, and be expected to perform at the same level of work. You will simply be working smarter instead of longer! As stated above, this change is aimed at making sure that we are able to maintain our well-being and thus our work-life balance. In short, we will now be a rested and energized team, that is creative and productive as always. As for the extra days off, this will give everyone ample time to attend to family and friends, indulge in hobbies, to rest and recharge, and to pursue their personal passion projects. As a team we will work together to establish a set of guidelines to ensure that everyone can make the new schedule work for them. Over the next few weeks we will publish out a number of best practices around schedule optimization, meeting best practices and more. We will also be hosting a Q&A this Thursday at [Time] where we will go through all of the new details and work through any last minute details and last minute concerns that you may have. This is going to be a great journey that we will face together. Your feedback is essential as we continue to refine the changes that we will make to continue to optimize our transition to the 4-day work week schedule. As always, thank you for all of your hard work and continued dedication. It is great to be able to recognize your efforts by making this change. Wishing you all a more balanced, productive and fulfilling future at work. Warm regards, [Your Name] [Your Title]

Stealth Writer

Rank #3 this cycle · run took 0:11

1/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.02caught
  • ZeroGPT1.00passed
  • Copyleaks0.00caught
  • Originality.ai0.34caught
Median
0.02
Meaning
96.5
Readability
55.0
Words
1.06× 236 → 251
Show output (251 words)

Exciting News: Transitioning to a Four Day Work Week next Quarter! Dear Team, I'm very excited to announce a big milestones for our company. We will move into a four day working week as of [Date] for the first time. The new schedule will be Monday to Thursday, Friday will be off. Most importantly, your compensation and benefits — and expectations of good work — will be unchanged. You don't need to work 40 hours in four days but you want to work smarter, not longer. This decision is taken from our immense care of your well being and work life balance. Rest, energy and focus equals creative and productive people! With a common three-day weekend, we want to give everyone more time to spend with their family, hobbies, resting and personal pursuits. We will be transitioning the way that we work in order for this transition to be a success. In the weeks ahead, we will post guidance on maximizing the use of our schedules, minimizing meetings, and more successfully using deep-work blocks. Also, a Q&A session will be held this Thursday at [Time] where logistics will be discussed as well as questions you may have. This will be a joint trip and as we monitor together, we will ask you for suggestions along the way. Thanks for your ongoing commitment and efforts, that helped to make this an exciting step a reality. Let's hope for a more balanced, productive and fulfilling future together! Warm regards, [Your Name] [Your Title]

HIX Bypass

Rank #4 this cycle · run took 0:15

1/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.07caught
  • ZeroGPT0.92passed
  • Copyleaks0.00caught
  • Originality.ai0.00caught
Median
0.00
Meaning
95.1
Readability
28.0
Words
1.10× 236 → 259
Show output (259 words)

A Four-Day Work Week Next Quarter Dear Team, Today, I am very excited to announce a big milestone for our company. Going forward, starting on [Date], we will officially be moving to a four-day work week. We will have a Fri-Sun schedule, luckily our new work week Monday through Thursday (with an off Friday). Significantly, the remuneration and perks you have negotiated and your general imperative to perform will not change one iota. We're not asking you to cram 40 hours of work into four days, rather working smarter open in new window; and less. This decision comes from our desire to support your well-being and work-life balance. That's why we believe that a rested and energized team is also the most creative, productive one. We want to make sure you have time for family, hobbies, rest and personal passion projects by making the three-day weekend last for everyone. We will be changing the way we work to enable this transition. In the next few weeks, we share details on how to upgrade our schedules by structuring less and constantly planning fewer meetings with prioritized deep-work blocks. We will also be hosting a FAQ this Thursday at [Time] to go over logistics and answer your questions. This is a co-creation journey, and we will check in with you regularly about how we adjust. Because of your hard work and commitment we are now able to take this exciting step — THANK YOU! To an all the way balanced, productive and fulfilling future together! Warm regards, [Your Name] [Your Title]

StealthGPT

Rank #12 this cycle · run took 0:18

1/5 detectors passed
  • GPTZero0.48caught
  • Winston AI0.00caught
  • ZeroGPT0.65passed
  • Copyleaks0.00caught
  • Originality.ai0.16caught
Median
0.16
Meaning
93.8
Readability
80.0
Words
0.98× 236 → 232
Show output (232 words)

Subject: New Schedule: A Four-Day Work Week Next Quarter Hi Team, This is some big news to share! We will be implementing a four-day work week starting in the next quarter on [Date]. We will no longer have anyone working Friday, but we expect the same level of performance as usual. Your compensation will remain unchanged. We are not expecting people to condense their normal workload into four days, but instead to work smarter. This change comes from our desire to improve everyone’s work life balance and overall health and wellness. We recognize that happy employees are productive, creative and passionate employees. With a long weekend every week, we hope to give everyone ample opportunity to spend time with their families and engage in activities and hobbies outside of work. As we make the transition to a four-day work week, we will adapt our workflows accordingly. Over the next few weeks, we will communicate about how to maximize productivity within this new schedule, as well as provide resources to help streamline communication and collaboration, and prioritize focused work time. On [Date] at [Time] we’ll host a Q&A to go over specifics. We will also continue to listen to your input as we adjust. Thank you for all your hard work and dedication, and thank you for making this great initiative possible. Cheers to an even better future! Best, [Your Name] [Your Title]

Walter Writes

Rank #9 this cycle · run took 0:19

0/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.44caught
  • Copyleaks0.00caught
  • Originality.ai0.00caught
Median
0.00
Meaning
97.3
Readability
62.0
Words
1.01× 236 → 238
Show output (238 words)

Subject: Exciting Transition to Four Day Work Week Next Quarter Dear Team, I am very excited to share some great news for our company. Starting next quarter on [Date], we will officially switch to a four day work week. Our new schedule will run Monday through Thursday and Friday will be off. Compensation, benefits and high quality output expectations will all stay exactly the same. We are not asking you to fit 40 hours into four days; rather, we are focusing on working smarter rather than longer. This decision is based on our strong commitment to your health and work life balance. We believe rested and energized team members are creative and productive ones. By giving everyone consistent three day weekends we want to make sure you have lots of time for family, hobbies, rest and personal passion projects. We will be successfully transitioning by adapting how we work. Over the next few weeks we will share guidelines on scheduling optimization, streamlining meetings and carving out deep work blocks. Thursday at [Time] we will host a Q&A session to discuss logistics and answer any questions you have. This is a collaborative journey and we will regularly seek your feedback as we adjust. Thanks for your consistent hard work that has made this exciting step possible. Here’s to a future that is more balanced and productive together! Warm regards, [Your Name] [Your Title] Sincerely, [Your Name] [Your Title] ()

Super Humanizer

Rank #10 this cycle · run took 0:16

0/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.12caught
  • Copyleaks0.00caught
  • Originality.ai0.00caught
Median
0.00
Meaning
93.9
Readability
88.0
Words
1.14× 236 → 269
Show output (269 words)

Subject: Huge Update: We're Going Four Days a Week Next Quarter! Hi Team, I'm so excited to announce that we're about to reach a huge milestone as a company. Beginning next quarter, on [Date], we will officially be moving to a four-day work week! Our new work week will operate from Monday through Thursday, with Fridays closed. Importantly, this means no changes to your pay, benefits, or quality expectations – we are still committed to excellence in everything we do. We aren't expecting you to cram 40 hours into four days, but rather to find ways to work more efficiently. This decision is a direct reflection of our commitment to your health and happiness. We know that a well-rested and engaged team is a creative and innovative one, and we want to provide you with a consistent three-day weekend to spend time with loved ones, pursue your passions, recharge, or just enjoy your life outside of work. We'll be making some adjustments to how we work to ensure this transition is smooth and successful. Over the next few weeks, we'll be rolling out tips and best practices for optimizing our schedules, managing meetings, and protecting our focus. We'll also be holding a Q&A session on Thursday at [Time] to discuss the logistics and address any questions you may have. This is a team effort, and we'll be relying on your input throughout the process. Thank you for all of your hard work and dedication that has allowed us to get to this point. Wishing you a more balanced, productive, and joyful work experience! Best regards, [Your Name] [Your Title]

Grammarly

Rank #11 this cycle · run took 0:11

0/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.01caught
  • Copyleaks0.00caught
  • Originality.ai0.00caught
Median
0.00
Meaning
99.1
Readability
88.0
Words
0.98× 236 → 232
Show output (232 words)

Subject: Exciting News: Transitioning to a Four-Day Work Week Next Quarter! Dear Team, I am excited to share an important milestone for our company. Starting next quarter on [Date], we will officially shift to a four-day work week. Our new schedule will be Monday through Thursday, with Fridays off. Importantly, your pay, benefits, and expectations for quality work will stay the same. We are not asking you to fit 40 hours of work into four days; instead, we are focusing on working smarter, not longer. This decision comes from our commitment to your well-being and work-life balance. We believe that a rested and energized team is both creative and productive. By giving everyone a consistent three-day weekend, we want to ensure you have enough time for family, hobbies, rest, and personal projects. To make this transition successful, we will adjust how we work. In the coming weeks, we will share guidelines on optimizing our schedules, simplifying meetings, and prioritizing focused work time. We will also hold a Q&A session this Thursday at [Time] to discuss logistics and answer any questions you may have. This is a team effort, and we will be looking for your feedback regularly as we adjust. Thank you for your ongoing dedication and hard work, which has made this positive step possible. Here’s to a more balanced, productive, and fulfilling future together! Warm regards, [Your Name] [Your Title]

Session recording