Head to head · September 2026 cycle
Penlify vs WriteHuman
WriteHuman finished 41.7 points ahead of Penlify in the September 2026 cycle, 78.29 to 36.57, ranking #1 against #14 in a field of 14. WriteHuman scored higher on 5 of 5 detectors and 7 of 7 writing categories. Penlify came out ahead on consistency across categories (100.0 vs 82.1) and readability (71.8 vs 56.9).
- Detectors
- 0 – 5
- Categories
- 0 – 7
- Components
- 2 – 3
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 →
Detector by detector
Share of each tool's outputs that a detector classified as human-written. WriteHuman took 5 of 5.
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 →
Where each one wins
Every measure above that one tool won outright, largest margin first within each group.
Penlify
2 wins- Consistency Score 100.0 vs 82.1
- Readability Score 71.8 vs 56.9
WriteHuman
15 wins- Bypass rate Score 90.1 vs 0.0
- Penalties Score None vs −5.0
- Meaning preservation Score 72.3 vs 62.7
- Originality.ai Detector 91.4 vs 0.0
- Copyleaks Detector 86.7 vs 0.0
- Winston AI Detector 84.1 vs 0.4
- GPTZero Detector 71.8 vs 0.0
- ZeroGPT Detector 77.8 vs 43.0
- Academic Essay Category 84.1 vs 27.0
- Blog Post Category 83.9 vs 37.3
- and 5 more
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.
AI-written input
Every tool on this prompt →Cover Letter · Application Essay · written by GPT-5.5 · 411 words
Dear Hiring Committee,
I am excited to apply for the Policy Analyst position with the City Government. I am drawn to this opportunity because it combines rigorous research, evidence-based decision-making, and direct public service—work that is essential to building a more effective, equitable, and responsive city. With experience in policy research, data analysis, stakeholder engagement, and written communication, I am confident in my ability to support the City’s efforts to design, evaluate, and improve programs that meet residents’ needs.
In my previous roles, I have developed policy briefs, analyzed quantitative and qualitative data, tracked legislative and regulatory developments, and translated complex information into clear recommendations for decision-makers. I am comfortable working with datasets, reviewing academic and government research, conducting interviews, and synthesizing findings into concise reports and presentations. Whether evaluating program outcomes, identifying service gaps, or assessing the fiscal and social impacts of policy options, I bring a careful, analytical approach and a strong commitment to accuracy.
I am particularly interested in city government because local policy has a direct and immediate effect on people’s daily lives. Issues such as housing affordability, transportation access, public safety, workforce development, climate resilience, and equitable delivery of services require thoughtful analysis and collaboration across departments, community organizations, and residents. I understand the importance of balancing technical evidence with community input, budget constraints, implementation realities, and long-term strategic goals.
My strengths include strong writing, attention to detail, and the ability to communicate with diverse audiences. I have experience preparing memos, briefing materials, presentations, and public-facing documents that make policy issues accessible without oversimplifying them. I also value collaboration and have worked effectively with program staff, elected officials, nonprofit partners, and community stakeholders. I approach this work with curiosity, professionalism, and respect for the lived experiences of residents most affected by policy decisions.
I would welcome the opportunity to bring my analytical skills and public service commitment to the City Government. I am especially motivated by the chance to contribute to policies that improve quality of life, expand opportunity, and strengthen trust between residents and local institutions. I believe my background in research, analysis, and communication would allow me to make a meaningful contribution to your team from day one.
Thank you for your time and consideration. I would be grateful for the opportunity to discuss how my experience and skills align with the needs of the Policy Analyst role. I look forward to the possibility of contributing to the City’s important work.
Sincerely, [Your Name]
Show the full input Show less
382 words (input 411)
Dear Hiring Committee,
I'm thrilled to toss my hat in the ring for the City's Policy Analyst role. The mix of digging into research, shaping decisions with hard data, and serving the public feels like exactly the kind of work that keeps a city humming. I've spent the last few years wading through policy reports, cranking numbers in spreadsheets, and chatting with stakeholders, so I think I can help the City design, test, and fine‑tune programs that really matter to residents.
At my last job I turned raw data into policy briefs, pulled trends from both surveys and interviews, and kept a close eye on new laws that could shift the landscape. I'm comfortable pulling datasets apart, skimming academic papers, and then boiling everything down into a few clear bullets for decision‑makers. Whether I'm checking if a program hit its targets, spotting a gap in services, or weighing the budget impact of a new ordinance, I bring a meticulous, numbers‑first mindset and a habit of double‑checking every claim.
What pulls me toward municipal work is how quickly a local decision shows up on a street corner or in a family's budget. Housing costs, bus routes, safety patrols, job‑training pipelines, climate‑proofing projects, these are the pieces that shape daily life. I've learned to juggle hard evidence with the stories residents tell, all while keeping an eye on the city's purse strings and long‑term plans.
Writing is one of my go‑to tools; I can craft a memo that feels like a conversation yet still hits the technical points, or a public flyer that doesn't dumb down the issue. I've partnered with program managers, elected officials, nonprofit leaders, and neighborhood groups, always trying to listen first and then translate those insights into something actionable. Curiosity drives me, and I try to bring a respectful, hands‑on attitude to every meeting.
I'd love the chance to put my analytical chops and public‑service drive to work for the City. Helping craft policies that lift quality of life, open doors for more people, and rebuild trust between neighbors and government sounds like a perfect fit. I'm ready to jump in and start contributing from day one.
Thanks for considering my application, I look forward to chatting about how my background lines up with what you need.
Sincerely, [Your Name]
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- GPTZero0.00caught
- Winston AI0.00caught
- ZeroGPT0.00caught
- Copyleaks0.00caught
- Originality.ai0.00caught
Passed 0 of 5 detectors.
Every Penlify run in September 2026 →452 words (input 411)
Dear Hiring Committee,
I am excited to apply for the Policy Analyst position with the City Government. I believe that the work of a Policy Analyst is important for building a city that is effective, equitable, and responsive. My background in policy research and data analysis, combined with my engagement and writing skills, prepares me to help the City in designing and improving programs that meet the needs of its residents.
In my previous positions, I have created policy briefs, analyzed all types of data, tracks changes in the law and legislation, and simplified dense material so that it is right-sized for the decision that is to be made. I am not Ph.D. terrify-ed. I am fully comfortable and able to work with and interpret data, research, and other things that I may need to interview people to gather the info that I need to write up what I will present to you. I have a developed sense of analysis and a strong commitment to accuracy and precision.
I am drawn to city government because I believe that city level policy can have a significant and positive impact on people's day to day lives. There are many important issues that I wish to help address including making housing more affordable, improving transport, and ensuring the safety and security of the public. I also wish to help make the city government employ joint interests of diverse people including those living in the city and community organizations. I wish to help make informed and evidence based policy that is acceptable to the community and is implementable given the resources and constraints of the city.
My major strengths are writing, detail orientation, and our ability to speak with and write for all audiences. I have written countless memos and briefs as well as presentations and documents for the public. I have a knack for distilling policy issues for the public without over-simplifying them. I am a team player having worked successfully with all levels of program staff, from local electeds to nonprofit partners and community stakeholders. I am interested in the City Government for the opportunity to work on policies that improve the city and build positive relations between city residents and local institutions. I have a strong background in research and analysis that I can bring to your organization. I would enjoy being a part of your team and helping you immediately upon hire.
I appreciate the opportunity to apply for the position of Policy Analyst and want you to know I value your time in considering my application. I look forward to speaking with you to share more about my experience and how it relates to this important work the city is doing.
Show the full output Show less
- GPTZero1.00passed
- Winston AI0.99passed
- ZeroGPT0.79passed
- Copyleaks1.00passed
- Originality.ai1.00passed
Passed 5 of 5 detectors.
Every WriteHuman 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 Penlify better than WriteHuman?
WriteHuman finished 41.7 points ahead of Penlify in the September 2026 cycle, 78.29 to 36.57, ranking #1 against #14 in a field of 14. WriteHuman scored higher on 5 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, Penlify or WriteHuman?
WriteHuman posted the higher bypass rate, 90.1 vs 0.0, and scored higher on 5 of 5 detectors. WriteHuman led on GPTZero, Originality.ai, Copyleaks, Winston AI and ZeroGPT.
Do Penlify and WriteHuman keep the original meaning?
WriteHuman preserved meaning better, 72.3 vs 62.7 on our 0–100 similarity scale. On readability, Penlify rated higher, 71.8 vs 56.9. Penalties this cycle: Penlify −5.0, WriteHuman None.