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The September 2026 results are in: WriteHuman holds #1, and newcomer SupWriter debuts at #5.Read the full analysis →
HumanizerBench

← September 2026 prompts

Business Email · Gemini 3.5 Flash

Business Email · written by Gemini 3.5 Flash · 269 words · prompt business_email

1
passed at least 4 detectors
12
failed at least one detector
1
not flagged, but fewer than 5 detectors scored it
14
tools tested on this prompt
Winston AI
hardest detector, caught 12 of 13

Input passage

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

Subject: Exciting News: Expanding Our Parental Leave to 20 Weeks Dear Team, At [Company Name], we believe our greatest strength is our people. Supporting you not just in your professional endeavors, but also in your personal lives and milestones, is at the core of our values. With this in mind, I am thrilled to announce a significant enhancement to our family benefits. Effective [Date], we are expanding our paid parental leave policy to **twenty (20) weeks of fully paid leave** for all eligible employees. This policy is fully inclusive. It applies to all parents—including birthing, non-birthing, adoptive, and foster parents—regardless of gender. Whether you are welcoming a child by birth, adoption, or foster placement, we want to ensure you have the time and financial security to bond with your growing family and adjust to your new routine. We recognize that the transition into parenthood is a profound milestone. By offering twenty weeks of paid leave, we hope to alleviate some of the pressure during this special time, allowing you to focus entirely on what matters most: your family. Our HR team will host a Q&A session on [Day of week, e.g., Thursday] at [Time] to walk through the details, eligibility criteria, and transition plans for those currently on leave or expecting. In the meantime, you can review the updated policy document on [Internal Portal/Shared Drive] or reach out directly to [HR Contact Email]. Thank you for your continued dedication to our mission. We are proud to invest in your well-being and to support you at every stage of your life journey. Warm regards, [Your Name] [Your Title] [Company Name]

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.

A few runs come back with fewer than 5 verdicts because a detector did not return a usable score for them. A run still counts as passing at least 4 detectors only if that many detectors actually scored it and passed it. A partially scored run is counted as caught if any detector that did score it flagged the output, and is otherwise listed separately as partly scored.

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.

Super Humanizer

Rank #11 this cycle · run took 0:09

5/5 detectors passed
  • GPTZero1.00passed
  • Winston AI0.85passed
  • ZeroGPT0.96passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Median
1.00
Meaning
91.0
Readability
22.0
Words
0.93× 269 → 250
Show output (250 words)

Hi Team! To update: Expand Parental Leave To 20 weeks by [Your Name] 7/31/15 Hi Team, At [Company Name], we know that our success is based on our talented team members, so we invest in providing support for our people throughout their lives and careers. Building on that commitment, today we're making an exciting advancement to our family benefit plan that will include fully paid parental leave. Effective July 27, 2015, we will offer 20 weeks paid parental leave for eligible new parents. All parents including birthing parents, adoptive parents, foster parents and non-birth partners will be eligible, regardless ofgender. Whetheryou were part of Welcoming 20 children this year through birth oradoption or if you're expecting in early-to mid-2016,we hope this will contribute to a smooth adjustment as you focus on family. We understand the transition into parenthood is one of life’s most rewarding challenges, and by providing two months' paid leave, we want to ease the burden on all new parents, letting you focus wholeheartedly on caring for your new family members and your baby. An FAQ addressing details of the updated policy and what itmeansfor various new and expected parents will be available on HRs online portal by 17. 9. A webinar and Q&A sessionon 3.16from10 AM– 11 AM PST will be held to explain the policy in more detail. More information will be share with expected new parents during the coming weeks. Thank you for your continued contributions to our mission. Warm regards, [Your Name] [YourTitle] [CompanyName]

Stealth Writer

Rank #2 this cycle · run took 0:09

3/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.01caught
  • ZeroGPT0.83passed
  • Copyleaks1.00passed
  • Originality.ai1.00passed
Median
0.83
Meaning
91.3
Readability
45.0
Words
1.09× 269 → 292
Show output (292 words)

To: All parents or guardians of children in the school community.All parents/guardians of children in the school community: Dear Team, Our people are our greatest strength at [Company Name]. At the very heart of our values is supporting you in your personal life and milestones, as well as in your professional. So, with this in mind, I am happy to state a huge improvement in our family benefits. As of [Date] we are enhancing our paid parental leave policy, offering all eligible employees 20 (twenty) weeks of fully paid parental leave. This policy is an inclusive policy. It is applicable to all parents, whether or not they are born, non-birthing, adoptive or foster parents, irrespective of gender. However, if you are adding to your family through birth, adoption or foster care, we want you to have the time and financial stability to bond with your new family and settle into your new life. We understand that becoming a parent is a significant event. We are providing twenty weeks of paid leave to help relieve some of the stress during this special period and to allow you to concentrate on what is most important – your family. Our HR team will be available on [Day of week – e.g. Thursday] from [Time] for a Q&A session to go through the details, eligibility requirements and transition plans for those on leave or expecting to be on leave. While this is the case, please check the revised policy document on [Internal Portal/Shared Drive] or contact the HR contact email directly. Many thanks for your ongoing support of our mission. We are here to invest in your health and to help you through all phases of your life. Warm regards, [Your Name] [Your Title] [Company Name]

Phrasly

Rank #8 this cycle · run took 0:16

3/5 detectors passed
  • GPTZero1.00passed
  • Winston AI0.02caught
  • ZeroGPT0.81passed
  • Copyleaks0.00caught
  • Originality.ai1.00passed
Median
0.81
Meaning
91.8
Readability
58.0
Words
0.93× 269 → 251
Show output (251 words)

Hey Team! At [Company Name], we pride ourselves on having the best team. We work to support you not only in your careers but in your lives outside of work and your biggest life events. With that said, I am excited to announce that we have decided to improve our parental benefits by offering... **Starting [Date], we will be offering all qualifying employees twenty (20) weeks of paid parental leave. ** Whether you give birth or don't, are adopting or fostering, welcome a child into your home- we want you to have that time to bond with your new family member(s) and settle into your new normal without the stress of being financially strained. Becoming a parent is a huge life change. We understand that and want to do our part in allowing you to enjoy every moment of it. We have increased our parental leave benefit from 12 weeks to **TWENTY (20) WEEKS OF FULL PAY**. HR will be hosting a Q&A regarding the new policy, who qualifies, and what it looks like for team members currently on leave or expecting on [Day of week, e. g., Thursday] at [Time]. You can find the policy on [Internal Portal/Shared Drive] in the meantime. If you have any questions, please don't hesitate to contact [HR Contact Email]. We appreciate all that you do for [Company Name]. You are our biggest asset and we are happy to continue giving back to you and your family. Stay awesome! [Your Name] [Your Title] [Company Name]

Walter Writes

Rank #10 this cycle · run took 0:22

3/5 detectors passed
  • GPTZero1.00passed
  • Winston AI0.06caught
  • ZeroGPT1.00passed
  • Copyleaks0.00caught
  • Originality.ai1.00passed
Median
1.00
Meaning
94.2
Readability
48.0
Words
1.22× 269 → 328
Show output (328 words)

Subject: big News: parental leave will now be 20 Weeks! Hello all, As an organization, we believe that one of the biggest strengths is the people working here. As such, supporting you both professionally as well as personally in times of major milestones in your life, is central to who we are. For this reason, i am so excited to share a very important update regarding one of our family benefit packages. Beginning on [Date], we are enhancing our paid family medical leave policy. This will now allow all eligible employees **twenty (20) weeks of full pay**, while they care for their newborn baby, whether born via biological delivery or adopted; and/or foster children. Please note that this policy is absolutely inclusive of all types of parents. The eligibility does not apply to specific genders. Regardless if you're having a child by biological delivery or adoption/foster placement; we want to provide you with the opportunity to spend quality Time with your family members during this extremely special Time of bonding and adjusting to your new role(s). We understand that entering into parenthood is an incredibly life-changing event. As such, we feel providing twenty weeks of paid leave will assist in alleviating many of the pressures associated with this transition. Thusly, enabling you to solely focus on caring for and spending Time with your loved ones. A member from our human resources department will hold a question & answer session about the changes to our policy including eligibility requirements and transitioning back to work on [day of week] at [Time]. Prior to this meeting Date and Time, please take advantage of reviewing the updated Company policy located on [Internal Portal/Shared Drive]; or simply Contact [HR Contact Email]. Once again thank you for your ongoing commitment to achieving our corporate mission. We appreciate investing in your overall well-being and being able to support you throughout all stages of your life's journey. Warm regards, [your name] [your job title] [Company name]

StealthBypass

Rank #13 this cycle · run took 0:16

3/3 detectors passed
  • GPTZero0.94passed
  • ZeroGPT1.00passed
  • Originality.ai1.00passed

2 of the 5 detectors returned no usable verdict for this run, so its pass count is out of 3, not 5.

Median
1.00
Meaning
81.5
Readability
62.0
Words
0.04× 269 → 11

Output is less than 0.6× the input length, penalized as length deflation (truncated).

Show output (11 words)

Subject: Fantastic News – We're Extending Parental Leave to 20 Weeks!

WriteHuman

Rank #1 this cycle · run took 0:15

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.88passed
  • Copyleaks0.00caught
  • Originality.ai1.00passed
Median
0.00
Meaning
91.5
Readability
58.0
Words
1.03× 269 → 277
Show output (277 words)

I'm excited to share that we have updated our family benefits. Dear Team, At [Company Name], our greatest strength is our people. We believe we can best support our employees by enhancing benefits to our employees’ personal lives and important moments. As of [Date], our paid parental leave has been updated to twenty (20) weeks of fully paid leave. This new policy extends to all parents, including but not limited to, birthing parents, non-birthing parents, adoptive parents, and foster parents, regardless of gender. We know that for any of your child’s formal arrivances, whether by birth, adoption, or foster placement, you need to be supported to take time off to bond with your child and to help your family adjust to your new situation and routine. We recognize that the arrival of a child is a life changing event. Our hope is that our new policy gives you the ability to take twenty weeks of paid leave to help you take the time you need to bond with your family and to help you adjust to your new situation. The HR team will be holding a Q and A on [Day of week] at [Time] to go over the new policy in detail. They will also be going over the new policies for employees on leave and those that are expecting. The HR team can be contacted at [HR Contact Email] and the new policy is available on [Internal Portal/Shared Drive]. Thank you for your continued commitment to our mission. We appreciate the opportunity to provide benefits that foster your well-being at every step of your life's journey. All the best, [Your Name] [Your Title] [Company Name]

HIX Bypass

Rank #3 this cycle · run took 0:10

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.08caught
  • ZeroGPT1.00passed
  • Copyleaks0.00caught
  • Originality.ai1.00passed
Median
0.08
Meaning
93.6
Readability
34.0
Words
1.18× 269 → 317
Show output (317 words)

Dear Team, We have decided to extend parental leave up 20 weeks! Dear Team, Now, at [Company Name] we think our biggest strength is all those working with us. Being there for you not only in your work but also the journey and events of life is what we believe. In view of this, I am excited to share one major update that we will be rolling out on our family benefits. Starting from [Date], we have expanded our paid parental leave policy to twenty (20) weeks of fully paid time off for all eligible employees. This policy is fully inclusive. They are gender-neutral and apply to all parents—both birthing and non-birthing, as well as adoptive or foster (where only one parent is biological). No matter if you are welcoming a child by birth, adoption or into your home for fostering purposes we want to make sure that you're able to have the time away with financial stability needed in order to bond with your family as they grow together and create their new normal. We understand that entering into parenthood is a big chapter. With twenty weeks of paid leave, we hope to take the weight off your shoulders for a moment so that you can focus on what matters most: Your Family. Our HR team will hold a question and answer session on [Day of week, e.g., Thursday] at [Time], to go over all the specifics, as well as who qualifies for this benefit and how we’ll handle employees who are currently out or expecting. In the meantime, you can refer to policy document on [Internal Portal/Shared Drive] or directly approach above prayer at [HR Contact Email]. Thank you for your ongoing commitment to our mission. Investing in well-being As your employer, we are proud to have the opportunity to support you through all steps of life. Warm regards, [Your Name] [Your Title] [Company Name]

AI Humanize io

Rank #4 this cycle · run took 0:17

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.55passed
  • Copyleaks0.00caught
  • Originality.ai0.95passed
Median
0.00
Meaning
96.1
Readability
68.0
Words
0.99× 269 → 265
Show output (265 words)

Subject: Exciting News about Our New 20-Week Parental Leave Policy Dear Team, At [Company Name], we believe that our most significant asset is our employees. Support for you in both your professional achievements as well as your personal milestones is part of our core values. We are excited to announce the expansion of our family benefits! Beginning [Date], we will offer paid parental leave of **twenty (20) weeks of paid leave** to all eligible employees. This policy will cover everyone! All parents- biological, adoptive, or foster- can take advantage of our new policy regardless of their gender. If you’re welcoming a new baby through birth, adoption, or foster care, we want you to be able to bond with your child and settle into your new life without any financial worries. We understand that becoming a parent is an extremely important event in the life of any person. We hope that 20 weeks of fully paid leave will relieve some of the stress of that moment so that you can focus on what’s important- your family! The HR department will hold a meeting on [Day of week, e.g. Thursday] at [Time] to cover the details, eligibility requirements, and transition plans for any employees currently on leave or who will be going on leave soon. Please feel free to use the updated policy on [Internal Portal or Shared Drive] or reach out if you have further questions at [HR Contact Email]. Thank you for being committed to our mission. We are excited and proud to support you throughout your journey! Sincerely, [Your Name] [Your Title] [Company Name]

SupWriter

Rank #5 this cycle · run took 0:13

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.58passed
  • Copyleaks0.00caught
  • Originality.ai1.00passed
Median
0.00
Meaning
95.0
Readability
58.0
Words
0.97× 269 → 260
Show output (260 words)

We are Extending Our Parental Leave to 20 Weeks Dear Team, We at the company believe that people are our strength. We value supporting you in your daily professional and personal lives and successes. With this in mind, I am pleased to let you know that we will be enhancing the family benefit. Starting from the effective date, paid parental leave for all eligible employees is being expanded to twenty (20) weeks of fully paid leave. This policy includes everyone. This includes all parents - birthing, non-birthing, adoptive and foster - no matter what their gender is. No matter whether your child is biological, adopted, or taken in for fostering, we would like to ensure that you have the time or financial security to build a bond with your growing family and fit in with the new routine. The transition into parenthood is a significant milestone through time. With twenty weeks of paid leave, we hope to ease your burden during this period so that you can give your attention fully to what matters most: your family. On [Day of week, e.g., Thursday] at [Time], our HR team will conduct a Q&A session to go through the details, eligibility, and transition plans for those on leave or expecting. For now, please review the updated policy document available on [Internal Portal/Shared Drive], or contact [HR Contact Email] directly. Your work is appreciated in pursuit of our mission. We are happy to invest in your wellness and support you at all stages of life. Best wishes. [Your Name] [Your Title] [Company Name]

Undetectable.ai

Rank #6 this cycle · run took 0:18

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.83passed
  • Copyleaks0.00caught
  • Originality.ai1.00passed
Median
0.00
Meaning
96.7
Readability
72.0
Words
1.23× 269 → 332
Show output (332 words)

Subject: Exciting News: Expanding Our Parental Leave to 20 Weeks Dear Team, At [Company Name] our biggest strength is without a doubt our employees. In addition to the regular support you can expect in your professional career, our core values support you in your personal life as well. This is why I am very excited to announce an update to the family benefits offered by the company. The 20 weeks of fully paid leave for parents will start on [Date] for all employees that are eligible for parental leave. This new policy will be fully inclusive of all parents, whether they be birthing, non-birthing, adoptive or even foster parents and will apply regardless of gender. The twenty weeks of paid parental leave will allow all new parents of [Company Name] to have the time and financial means to spend precious time with their children and to enable them to settle into their new family routines. These are special and often challenging times for new parents and we want to support them in their transition to family life. We hope this extended leave will ease some of the financial and personal pressure that can occur during this time and give parents the extra time and support they need to bond with their new baby and settle into their new family role. During the Q&A session on Thursday at [Time] HR will walk through the updated family benefits for those currently on leave and those expecting to go on leave in the near future. The updated family benefits are contained within the updated policy document which can be found on the internal portal or shared drive. Should you require any clarification or have any questions then please reach out to [HR Contact Email]. Thank you for your continued contributions to our company and to the greater good of our customers. It is wonderful that we are able to support and care for you throughout your life. Warm regards, [Your Name] [Your Title] [Company Name]

StealthGPT

Rank #9 this cycle · run took 1:13

2/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.01caught
  • ZeroGPT0.97passed
  • Copyleaks0.00caught
  • Originality.ai1.00passed
Median
0.01
Meaning
97.1
Readability
78.0
Words
0.95× 269 → 256
Show output (256 words)

Subject: Exciting News: Expanding Our Parental Leave to 20 Weeks Dear Team, At [Company Name], we’re proud to make sure our benefits are cutting-edge in the industry and support employees not just at work, but at all stages of life. We’re so excited to announce we’ll be expanding our parental leave! Beginning on [Date], all eligible employees can enjoy twenty (20) weeks of fully paid leave. We firmly believe all employees should have the time and financial security they need to navigate this monumental life event. This will give all parents the time and support they need to bond with their new addition and settle back into their normal routine. The updated policy applies to all forms of parents (including birth, non-birth, adoption, and foster) and is inclusive of all genders. On [Day of week, e.g., Thursday] at [Time], we’ll have the HR team join us for a quick informational Q&A to discuss how this policy will apply to employees expecting or currently on leave. We’ll walk through the updated policy, eligibility, and answer any questions that may arise. We’re so grateful to our entire team for your dedication to our mission! We’re lucky to have such a caring and driven group of employees, as they are our greatest assets, and we’re always working to find ways to support your personal lives as well. We know you have questions! Check out the new policy at [Internal Portal/Shared Drive]. Feel free to reach out to HR as well with any questions at [HR Contact Email]. [Your Name],

Humanize AI Pro

Rank #7 this cycle · run took 0:19

1/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT0.06caught
  • Copyleaks0.00caught
  • Originality.ai1.00passed
Median
0.00
Meaning
95.5
Readability
66.0
Words
0.98× 269 → 263
Show output (263 words)

Subject: Exciting Announcement: Our Parental Leave Benefit Extended to 20 Weeks Hello Everyone, At [Company Name], we consider our people to be our biggest asset. It's our mission not only to provide our employees with the necessary tools for their professional growth but also to care about our people's personal achievements and needs. Today, I would like to share with you a great piece of news about one of our family benefits. Starting from [Date], we will offer to take **20 weeks of paid parental leave** to all eligible employees of our company. This policy is fully inclusive and will be applied to all parents, whether it is birthing, non-birthing, adoptive, or foster parents. This means that if you are bringing a baby to your family via birth, adoption, or foster care, we want you to spend time with your new family members without worrying about your finances and work responsibilities. Parenthood is an absolutely unique experience in one's life. Providing our people with 20 weeks of fully paid parental leave will allow us to make this experience more enjoyable. Please note that our HR department will host a Q&A event on [Day of week] at [Time] where we will provide all the details regarding the new policy, its eligibility, and transition to those who are now taking a parental leave or expecting soon. Also, you can find the updated policy in [Internal Portal/Shared Drive] or contact [HR Contact Email] with any further questions. Thank you for your hard work and dedication to our mission. Best Regards, [Your Name] [Your Title] [Company Name]

Grammarly

Rank #12 this cycle · run took 0:10

1/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.01caught
  • ZeroGPT0.36caught
  • Copyleaks0.00caught
  • Originality.ai0.89passed
Median
0.01
Meaning
98.4
Readability
62.0
Words
1.14× 269 → 307
Show output (307 words)

Subject: Exciting News: Expanding Our Parental Leave to 20 Weeks Dear Team, At [Company Name] we think our biggest strength lies in our people; support being provided by us not only in your professional activities but also in your personal lives and at various stages in your life is fundamental to our values. Given that, I am very excited to announce a major improvement to our family benefits. From [Date] onwards, our paid parental leave policy is being expanded to include twenty (20) weeks of fully paid leave for all eligible employees. The policy is inclusive in every respect and covers all parents—this includes birthing parents, non-birthing parents, adoptive parents, and foster parents—no matter their gender. If you are taking in a child through birth, adoption, or by foster placement, we want to make sure you have the time and financial security needed to form a bond with your growing family and to get used to your new routine. We know that becoming a parent is a significant achievement. Since we are providing twenty weeks of paid leave, we hope this will help reduce the pressure you experience at this important time and enable you to concentrate completely on what is most important—your family. The human resources team will be holding a Q&A session on [Day of week, e.g., Thursday] at [Time] in order to go over the details, the eligibility criteria, and the transition arrangements for people who are currently on leave or who are expecting. In the meantime, you may look at the revised policy document on [Internal Portal/Shared Drive] or contact [HR Contact Email] directly. We thank you for your ongoing commitment to our mission, and we are proud to be investing in your well-being and to support you at all stages of your life journey. Warm regards, [Your Name] [Your Title] [Company Name]

Penlify

Rank #14 this cycle · run took 0:37

1/5 detectors passed
  • GPTZero0.00caught
  • Winston AI0.00caught
  • ZeroGPT1.00passed
  • Copyleaks0.00caught
  • Originality.ai0.00caught
Median
0.00
Meaning
94.5
Readability
78.0
Words
0.70× 269 → 188
Show output (188 words)

Subject: Great news: paid parental leave is now 20 weeks Dear team, At [Company Name], our people come first. So starting [Date], we're bumping our fully covered paid parental leave up to 20 weeks. This covers any new parent, really. Giving birth, adopting, fostering, or supporting your partner... path and gender don't change anything here. We just want you to have the time and financial backing to get to know your new little person without worrying about work. Becoming a parent is honestly a wild ride. With these 20 weeks, you can breathe a bit easier and put your family way ahead of your inbox. Have questions? HR is hosting a call Thursday at [Time] to walk through eligibility and explain how this works for folks currently on leave or expecting soon. The full policy is already live on the portal, but you can always drop a line to [HR Contact Email] if something isn't clear. Thanks for giving your all every day. It feels great to turn around and invest some of that support back into your home life. Warm regards, [Your Name] [Your Title] [Company Name]

Session recording