AI Humanizer Benchmark
September 2026 prompts

Business email

Business email · 233 words · prompt business_email

1
passed at least 6 detectors
11
failed at least one detector
11
tools tested on this prompt
Winston AI
hardest detector, caught 10 of 11

Input passage

Generated fresh for this cycle; this exact text was pasted into every humanizer below.

Subject: New Policy: No Internal Emails After 6 PM Hi Team, Effective immediately, we're implementing a new communication guideline: no internal emails sent after 6 pm. This applies to all team members. The purpose of this policy is straightforward—to protect everyone's time outside work and promote better work-life balance. Research consistently shows that constant connectivity leads to burnout, reduced productivity,Show full input (233 words)
Subject: New Policy: No Internal Emails After 6 PM Hi Team, Effective immediately, we're implementing a new communication guideline: no internal emails sent after 6 pm. This applies to all team members. The purpose of this policy is straightforward—to protect everyone's time outside work and promote better work-life balance. Research consistently shows that constant connectivity leads to burnout, reduced productivity, and decreased wellbeing. By establishing this boundary, we're prioritizing your health and the long-term sustainability of our team. Here's what this means practically: **After 6 pm:** Don't send internal emails to colleagues. If something urgent comes up, we can use our designated emergency communication channel (contact [manager name] for details). For non-urgent matters, schedule your emails to send the next morning using your email client's scheduling feature. **Emails you receive after 6 pm:** You're not expected to read or respond to them that evening. This is guilt-free time. **Scope:** This covers emails between team members. Client communications, external emails, and truly time-sensitive matters handled through appropriate channels remain unchanged. **Managers:** Please model this behavior consistently and support your direct reports in unplugging. I recognize this requires adjustment, but I'm confident it will benefit everyone. We'll have fewer interruptions, better focus during work hours, and genuinely restful evenings. If you have questions or foresee challenges with this policy, please reach out. Thank you for your commitment to maintaining healthy boundaries. Best regards, [Your 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. A verdict counts as passed when that score is at least 0.50, the midpoint of the scale; hover any dot for the exact value. That threshold exists only to draw the dots: the bypass rate on the leaderboard is the mean of each test's median score across the 7 detectors, a continuous number, so a tool's pass count and its bypass rate will not be the same figure. Likewise a detector-rate row is the mean of that detector's scores, the same number the detector pages rank by, not a count of green dots.

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 7 detectors scored it.

StealthGPTRank #7 this cycle
6/7 detectors passed
GPTZero
1.00passed
Winston AI
0.97passed
Originality.ai
0.99passed
ZeroGPT
0.71passed
Grammarly
1.00passed
QuillBot
1.00passed
Copyleaks
0.00caught
Median
0.99
Meaning
94.3
Readability
87.0
Words
0.99× 233 → 231
Show output (231 words)
Subject: New Policy: No Internal Emails After 6 PM Hi Team, We know that it is important for all of us to be able to disconnect from work after hours. As such, we are implementing a new policy regarding work-related email after 6 pm effective immediately. No employee should be sending internal emails, (meaning between team members) after 6 pm or be expecting to reply to them until the next business day. If an email needs to be sent after 6 pm but isn’t time sensitive we suggest utilizing the email function that allows you to schedule messages to be sent the next morning. If there is an emergency that needs immediate attention then we can reach each other through emergency communication channels. External communications aren’t affected by this guideline. Managers are expected to set an example by adhering to this policy and help direct reports understand the importance of being able to disconnect as well. According to studies constant connectivity leads to decreased productivity, workplace burnout and diminished wellbeing. By observing the new after-hours email guideline, we will protect our evening time, feel more focused at work, and ultimately have a happier, healthier and more sustainable future at work. Please don’t feel bad about disconnecting from your team members after 6 pm. If you have any questions or feedback regarding this policy please reach out. Thank you for your cooperation.
UndetectedGPTRank #1 this cycle
5/7 detectors passed
GPTZero
1.00passed
Winston AI
0.01caught
Originality.ai
0.99passed
ZeroGPT
0.81passed
Grammarly
1.00passed
QuillBot
0.89passed
Copyleaks
0.00caught
Median
0.89
Meaning
96.5
Readability
72.0
Words
1.19× 233 → 278
Show output (278 words)
Subject: New Policy: No Internal Emails After 6 PM Dear Team, From today I will introduce a new communication policy: no internal emails after 6pm. This applies to all team members. ## After 6 PM: Simply put the aim of this policy is to respect everyone's time outside work and help build a more sustainable work life balance. Repeatedly I see in my own data and in research that constant connectivity leads to burnout, reduced productivity and poorer wellbeing. Through this policy I am putting your wellbeing and sustainability of my team first. Please don't send internal emails to colleagues. If you have an urgent matter my agreed emergency communication route can be used (ask your manager for more detail). Where it's not urgent use the scheduling function in your email client to send the email the next morning. ## Emails received after 6 PM: You don't need to check or respond to these in the evening. This is guilt free time. ## Scope: This policy applies between team members. There is no change to external emails, client communications or time sensitive matters dealt appropriately via other channels. ## Managers: Please consistently follow this yourself and encourage your own direct reports to disconnect from work. I know this will take some getting used to but I believe over time it will benefit my team. More of my time will be freed up from interruptions, I'll be more focused during working hours and will have more restful evenings. If you think there may be challenges in implementing this or have any questions please let me know. Thanks for your help in upholding healthy professional boundaries. Best regards, [Your Name]
CleverHumanizerRank #9 this cycle
5/7 detectors passed
GPTZero
0.00caught
Winston AI
0.01caught
Originality.ai
1.00passed
ZeroGPT
0.59passed
Grammarly
1.00passed
QuillBot
0.74passed
Copyleaks
1.00passed
Median
0.74
Meaning
96.1
Readability
74.0
Words
1.25× 233 → 292
Show output (292 words)
Subject: New Policy: No Internal Emails After 6 PM Team, Effective immediately, we will be enforcing a new communications policy: no internal emails (between teammates) may be sent after 6pm. The goal of this policy is to protect your time and energy outside of work hours. Studies have shown that people who are constantly connected at work are much more likely to experience burnout and reduced overall life satisfaction. By implementing this policy, we are striving to improve the quality of our team's lives Here are some important details: After Hours: Do not send internal team member emails after 6pm. In the case of an emergency, we will have set up an alternate communication channel (ask [manager name] for more info). For non-urgent matters, you may schedule your email to be sent the next morning, using your email client's "schedule send" feature. Emails recieved in the evening: Do not feel obligated to read or respond to emails recived after 6pm that evening. This policy applies to emails sent to teammates. There are no changes to how we communicate with clients, or how you may choose to respond to emails. After hours is after hours! This policy does not apply to emails sent to clients or other work related matters that require immediate attention. Managers: Please remember to model this behavior for your direct reports. I know this will be a change for many of you, but I have faith that you will all come to appreciate the downtime We will all be less distracted at work, and you will be able to enjoy non-work related activities in the evening. If you have any questions or concerns about this policy, please let me know. Thanks for being such a considerate team! [Your Name]
SmartHumanizerRank #2 this cycle
4/7 detectors passed
GPTZero
0.00caught
Winston AI
0.00caught
Originality.ai
0.98passed
ZeroGPT
0.83passed
Grammarly
0.87passed
QuillBot
0.89passed
Copyleaks
0.00caught
Median
0.83
Meaning
96.8
Readability
78.0
Words
1.12× 233 → 261
Show output (261 words)
# Subject: New Policy: No Internal Emails After 6 PM Hi Team, Effective immediately we will introduce a new communication policy that no internal emails should be sent after 6pm. This applies to all our team members. Underlying this policy is simply a desire to respect everyone's time outside work and encourage better work life balance. Time and time again research shows constant connectivity risks burnout, reduced productivity and reduced wellbeing. Through this policy we are putting your health and sustainability of our team at the forefront. ## After 6 pm: Please don't send internal emails to colleagues. If you need to raise an urgent point then we can use our agreed emergency communication route (ask your manager for details). For non urgent points schedule your email to go out the following morning via the scheduling function in your email client. ## Emails you receive after 6 pm: You won't need to read or act on this that evening. It's guilt free time. ## Scope: This applies between team members. There is no change to external emails, client communications or where appropriate time sensitive matters will continue via existing channels. ## Managers: Please follow this consistently yourself and encourage your own direct reports to unplug. I know this won't be easy but I believe it will benefit us all. Less interruptions during the day, better focus at work, more restful evenings. If you think there could be challenges with this policy or have any questions please let me know. Thanks for your help in upholding healthy boundaries. Best regards, [Your Name]
WriteHumanRank #3 this cycle
4/7 detectors passed
GPTZero
0.00caught
Winston AI
0.01caught
Originality.ai
0.68passed
ZeroGPT
0.85passed
Grammarly
1.00passed
QuillBot
0.64passed
Copyleaks
0.00caught
Median
0.64
Meaning
94.7
Readability
87.0
Words
0.97× 233 → 225
Show output (225 words)
New Policy: No Internal Emails After 6 PM Dear Team, We have a new company policy: no internal emails after 6 PM. This policy will be in effect immediately and will apply to all of us. This carves out time for our family and friends outside of work without sacrificing our well-being and productivity in the long term. There is a lot of research that shows if we allow ourselves to be constantly connected, we burn out, become less and less productive, and feel worse overall. This policy is in the best interest of you and the long-term health of our company. The intention of this policy is to create the following: 6 PM and after: Never send internal emails 6 PM and after: Do not read internal emails that were sent AFTER 6 PM (this is your guilt-free time). This policy only applies to internal emails. External emails and client communications, in addition to urgent matters, can still be communicated through the appropriate channels. Managers, please create the same policy for yourself and help your team members disconnect. This will take some getting used to, but I believe this will improve everyone's quality and quantity of rest. Feel free to reach out if you have any concerns or if you have questions that aren't answered above. Thank you for your understanding. Best, [Your Name]
GPTinfRank #4 this cycle
4/7 detectors passed
GPTZero
0.99passed
Winston AI
0.01caught
Originality.ai
0.00caught
ZeroGPT
0.88passed
Grammarly
0.86passed
QuillBot
0.87passed
Copyleaks
0.00caught
Median
0.86
Meaning
93.1
Readability
73.0
Words
1.00× 233 → 234
Show output (234 words)
Subject: New Policy: No Emails Internally After 6PM Hello Team, From today on, we start using a new communication guideline: no internal emails from after 6pm. All team members should follow this rule. The reason for implementing this policy is obvious – to maintain the separation between working time and personal time in order to prevent stress, reduce the level of stress, improve productivity and help everyone stay healthy. Here is what you need to do in order to meet this requirement: **After 6pm:** You shouldn't be sending any internal emails to your colleagues. In case of any emergent issues, there is a special channel for communicating about such problems (ask [manager name] for more information). As for non-emergent issues, you can simply schedule sending emails tomorrow using the email service. **Emails received after 6pm:** You don't have to read them and respond at once. You can just ignore them without feeling guilty. **Scope:** The emails between colleagues are included into this guideline. Client communications, any other emails or emergent issues that you handle through special channels are not affected by this rule. **Managers:** Please set an example for your subordinates and follow this rule. It is obviously hard to get used to, but I think that it is good for us. Please inform me if you have any questions regarding this guideline or foresee some difficulties with its implementation. Best regards, [Your Name]
HIX BypassRank #6 this cycle
3/7 detectors passed
GPTZero
0.00caught
Winston AI
0.06caught
Originality.ai
0.01caught
ZeroGPT
0.89passed
Grammarly
0.80passed
QuillBot
1.00passed
Copyleaks
0.00caught
Median
0.06
Meaning
85.9
Readability
72.0
Words
1.04× 233 → 243
Show output (243 words)
//10月06日|新政,不得6点后再发内部邮件 Hi Team, We are instituting a new internal email rule, starting now: no emails to ourselves after 6 pm. This is true for all teams members. It is simple why this policy exists: to free up some time from work for everyone, and foster a more balanced work-life. Numerous studies have highlighted that being constantly connected results in burnout, decreased productivity and worse wellbeing. Setting this boundary is a form of self-care and also a way to ensure our team can continue working together sustainably for the long haul. Here's what this means practically: **Post 6 pm:** No internal mails to colleagues. You can use our emergency communication channel (contact [manager name] for more info) if something urgently comes up. Use your email client scheduling feature to set emails to go out the next morning for non-urgent things. **Email sent after 6 pm,** you are not obliged to read it nor reply. This is guilt-free time. **Scope:** Emails between TeaM members Communications with clients, external emails and true time sensitive items routed through appropriate channels are still the same. Managers: Lead by example and encourage your direct reports to unplug. I know this is a change but I think it's going to be better for everyone. Fewer interruptions, far better work hour focus and actually restful evenings. If you have questions or anticipate potential issues with this policy, please contact us. Thank you for staying within healthy boundaries. Best regards, [Your Name]
AI HumanizeRank #5 this cycle
2/7 detectors passed
GPTZero
0.00caught
Winston AI
0.01caught
Originality.ai
0.00caught
ZeroGPT
0.83passed
Grammarly
0.49caught
QuillBot
0.64passed
Copyleaks
0.00caught
Median
0.01
Meaning
94.6
Readability
72.0
Words
1.07× 233 → 250
Show output (250 words)
Subject: New Policy: No Internal Emails After 6 PM Dear Team, We are announcing a new communication policy to all employees effective immediately. From now on, no one is allowed to send internal emails after 6 PM. The objective of this policy is quite uncomplicated: to save the evenings of employees and safeguard their work-life balance. Numerous studies have shown that permanent communication leads to burnout and lower productivity. By introducing this new communication rule, we are concerned with employees’ health and long-term survival of our team. Here is how it works: - **After 6 PM:** no internal emails to colleagues. Please use our emergency communication channel for urgent questions (contact [manager for the information]). If your question is not urgent, please use your email account’s function to schedule your message to be sent the next morning. - **If you get an email after 6 PM:** you are not obliged to react to it. This is your unbeached evening. - **Scope:** this restriction applies to internal emails only. Emails related to clients and important communications that require urgency follow the usual procedure. - **Management:** please lead by example by promoting this attitude among your employees. I realize that this might be challenging for some of you, however, I believe that we will benefit from this new approach as a result of having fewer disturbances, better concentration at work, and more relaxation and enjoyment in evenings. If you have any questions or concerns, please let me know. Best regards, [Your Name]
SuperHumanizerRank #8 this cycle
1/7 detectors passed
GPTZero
0.00caught
Winston AI
0.01caught
Originality.ai
0.00caught
ZeroGPT
0.03caught
Grammarly
0.60passed
QuillBot
0.26caught
Copyleaks
0.00caught
Median
0.01
Meaning
96.5
Readability
78.0
Words
1.18× 233 → 274
Show output (274 words)
Subject: New Policy: No Internal Emails After 6 PM Hi Team, I'm happy to announce a new communication policy that goes into effect immediately: no internal emails between team members will be sent after 6:00 PM, Monday through Friday. The reasoning behind this policy is simple-we want to protect your time off and encourage a better work-life balance. The fact is, constant connection can be detrimental to our wellbeing and productivity, leading to burnout. In implementing this policy, we're putting everyone's long-term success (both personally and professionally) first. This policy means: No internal emails will be sent to your colleagues after 6 PM. If something is truly urgent, it should be directed via our designated emergency contact protocol (ask [manager's name] if you need a refresher). For less time-critical items, feel free to use your email client’s scheduling feature for the following morning. Don't expect yourself (or others) to read emails received after 6 PM. This time off is guilt-free. What this doesn't mean: this policy does not apply to client communications, external emails, or other messages where time-sensitive responses are expected. Managers, please ensure that you are modeling this behavior with your teams and encouraging your direct reports to embrace this change. I know that this policy represents a shift in habits, but I’m confident it will lead to improved focus during the day, fewer distractions, and the valuable downtime we all need. If this policy is going to be exceptionally challenging for you due to your role, please discuss it with me directly. Thank you for your cooperation in making our team culture even more healthy and balanced. ## Best, [Your Name]
ReHumanizeRank #10 this cycle
0/7 detectors passed
GPTZero
0.00caught
Winston AI
0.00caught
Originality.ai
0.00caught
ZeroGPT
0.01caught
Grammarly
0.39caught
QuillBot
0.26caught
Copyleaks
0.00caught
Median
0.00
Meaning
94.1
Readability
82.0
Words
1.22× 233 → 284
Show output (284 words)
Subject: New Rule: No Internal Emails After 6 PM Hi Team, Starting now, we have a new rule about sending emails: no internal emails after 6 PM. This applies to everyone on the team. The reason for this is simple: we want to make sure everyone gets to switch off after work and have a better work-life balance. Studies show that being always online leads to burnout, less productivity, and lower well-being. By setting this limit, we're focusing on your health and making sure our team can keep going strong in the long run. Here’s how this will work in practice: After 6 PM: Please don't send internal emails to your colleagues. If something is urgent, use our special emergency channel (ask [manager name] for how to do this). For things that aren't urgent, you can schedule them to go out the next morning using your email program's scheduling tool. Emails you get after 6 PM: You don't need to read or reply to them that night. Feel free to disconnect without guilt. What this covers: This rule is for emails sent between team members. Emails with clients, external emails, and urgent issues that need a different way to be handled are not affected. Managers: Please set a good example by following this rule yourself and help your team members switch off. I know this will take some getting used to, but I believe it will help everyone. We'll have fewer distractions, be able to concentrate better during work hours, and enjoy truly relaxing evenings. If you have any questions or think you might run into problems with this policy, please let me know. Thanks for helping us keep healthy boundaries. Best, [Your Name]
Undetectable AIRank #11 this cycle
0/7 detectors passed
GPTZero
0.00caught
Winston AI
0.00caught
Originality.ai
0.00caught
ZeroGPT
0.37caught
Grammarly
0.00caught
QuillBot
0.12caught
Copyleaks
0.00caught
Median
0.00
Meaning
96.6
Readability
74.0
Words
1.45× 233 → 339
Show output (339 words)
Subject: New Policy: No Internal Emails After 6 PM Hi Team, Starting right now, we've got a new rule for talking to each other at work: no sending emails to colleagues after 6 pm. This goes for everyone on the team. This policy is simple: it's meant to keep your life outside of work safe from work itself. We know that being "on the clock" all the time can be really bad for you - it can make you feel exhausted, affect how well you do your job, and even make you unhappy. So, we're setting a clear boundary to help you stay healthy and make sure our team can keep going strong in the long run. Here's what this means practically: When the clock strikes 6 pm, it's time to put the brakes on sending internal emails to your colleagues. If something super urgent pops up, don't worry, we've got a backup plan - just reach out to our manager for the lowdown on our emergency communication channel. But for everything else, just schedule those emails to go out the next morning using your email client's fancy scheduling feature. That way, you can keep your work and personal life separate, and your colleagues will appreciate the breather too. **Emails you receive after 6 pm:** You're not expected to read or respond to them that evening. This is guilt-free time. This policy applies to emails sent between team members. It doesn't affect how we communicate with clients or handle urgent matters, which will still be dealt with through the proper channels. **Leaders:** It's really important for you to set a good example and encourage your team members to take breaks and disconnect from work when they need to. I recognize this requires adjustment, but I'm confident it will benefit everyone. We'll have fewer interruptions, better focus during work hours, and genuinely restful evenings. If you have questions or foresee challenges with this policy, please reach out. Thank you for your commitment to maintaining healthy boundaries. Best regards, [Your Name]

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