I put the GPTHuman AI Humanizer to the test with three AI-generated text samples.
In this post, I’ll test and give an overall review of the tool, and show the results.
Disclaimer: This post has affiliate links at no cost to you.
How to Use It
Getting started with GPTHuman is easy. Enter their website here, and sign up.
The tool has a Free plan, but the paid plans come with more extensive features and no word limits.
In addition to Humanizer, GPTHuman also has an AI Detector and many other features.
My Results
I asked ChatGPT to generate three different text samples on random topics. Then, I humanized the texts using Humanize AI and ran a separate AI Detection scan on Undetectable AI to see their AI scores after humanizing.
When inputting your text, you can change the “Tone” of your text to match your audience, or the “Mode” to tweak how human-like your text will turn out after humanizing.
The tool will rate your text after humanizing using the following parameters:
Here I tested text sample number 1; the humanized version is on the right. With these settings, the tool gave the following ratings.
I changed the “Tone” into PhD, which lowered the Human score. I would imagine that if the text is more academically sounding and polished, it’s more likely to be flagged as AI-generated.
And finally, here is the humanized text with Standard tone. As you can see, the language is much simpler.
And then I ran the AI Detection scan on the humanized texts.
First is the text with a “PhD” tone that GPTHuman gave the Human score of 93. As I expected, more polished language is more likely to get flagged as AI.
Here is the text with the “Standard” tone. It’s 58 % likely human-generated and probably would pass as human-written.
Text number 2 with “College” tone.
and text number 2 with “High School” tone.
Text number 3 with “High School” tone.
It didn’t yield very good results, so I decided to try the “Re-humanize” feature.
After re-humanizing, my text sample passed as human-written. So, if you’re not satisfied with the results, you can always re-humanize it.
I ran one more test with text number three, this time using a different mode. The “Professional” mode makes the text sound less original and less human-like, so you’d expect the Human Score to be lower.
The humanized text passed as likely human-generated.
Pros
- Easy and fast to use
- Has additional features that stand out from other similar tools
- Can set different modes or tones to better target your audience
- Re-humanizing the text improved the Human score
Cons
- Limited words with the free trial
Pricing
Here are the pricing plans that GPTHuman currently offers.
- Starter: $8.25 per month
- Plus: $14.00 per month
- Unlimited: $26.00 per month
You can also use the tool for free, but it comes with a word limit of 300 words.
In Summary
AI Humanizers, like GPTHuman, rewrite AI-generated text to make it appear more human-like.
After having tested the Unlimited plan, I was very positively surprised with the results GPTHuman delivered. I was able to tweak the mode and tone of my texts (and the humanized output). With the “PhD” tones and more polished text, the human score remained lower, as one would expect. GPTHuman has a “Re-humanize” feature, which allows you to run the humanization on your text again. For me, this significantly improved the human score and made the text pass as human.
The tool itself is easy to use and delivers the results quickly. I was able to humanize my AI-generated text samples so that they passed the external AI Detector tool I used.
To Take Home
AI humanizers try to make AI-generated text sound more “human” by tweaking phrasing structure and tone. Some even promise refunds if your text gets flagged as AI.
Honestly, these tools aren’t very reliable and don’t really add much value. If you must use content generated by ChatGPT, it’s much better to edit and polish it yourself than try to trick a detection system.
My test text samples
Here are the text samples I used. The samples are generated 100 % by ChatGPT. The samples are different topics and lengths, varying from 150 words up to 500 words.
Text sample 1 — 150 Words
Houseplants do more than decorate our homes; they quietly transform the air we breathe and the way we feel. A touch of green can soften even the most sterile apartment, making it feel alive and personal. Caring for plants teaches patience — you can’t rush a seed to sprout or a leaf to unfurl. Each morning, a small routine of watering or pruning becomes a mindful pause in the day. The scent of soil, the sight of new growth, and even the occasional wilted leaf remind us that everything thrives through attention and consistency. Beyond aesthetics, studies show that plants reduce stress and improve concentration, making them tiny guardians of both mood and productivity. In a world full of screens and noise, a simple pothos on a windowsill offers a quiet, grounding reminder of nature’s calm persistence.
Text sample 2 — 300 Words
Coffee is more than a beverage — it’s a ritual, a global language spoken in mugs and espresso cups. From the bustling cafés of Rome to the quiet drip brewers of Japan, coffee culture reflects both tradition and innovation. Each region adds its own personality: Italians linger over a quick espresso, Scandinavians sip black filter coffee, and Australians have perfected the smooth, creamy flat white.
What makes coffee special isn’t just caffeine; it’s connection. We meet friends “for coffee,” brainstorm over it, and pause mid-morning to refocus. The familiar aroma signals comfort and productivity all at once. Even in solitude, brewing coffee feels communal — millions of people perform the same act every day, in different corners of the world.
Beyond its social role, coffee is a science of flavor. Roast profiles, grind size, and water temperature determine whether a cup tastes rich and nutty or sharp and citrusy. Specialty roasters and baristas treat it as an art form, crafting drinks that highlight subtle notes like chocolate, berries, or flowers. The modern coffee movement has revived appreciation for the farmers and regions behind each bean, encouraging sustainability and fair trade.
Ultimately, coffee unites people not just through shared taste, but through shared time — a few quiet minutes in an otherwise restless day.
Text sample 3 — 500 Words
IFor centuries, humans have looked up at the night sky in wonder. Before city lights and technology, the stars were our calendar, our map, and our mythology. Even today, when satellites and telescopes have revealed much about the universe, the act of stargazing still feels deeply human — a bridge between curiosity and peace.
The beauty of the night sky lies in both its mystery and familiarity. We recognize constellations that our ancestors once named, from Orion’s Belt to the Big Dipper. These patterns remind us that across cultures and millennia, people have shared the same view above. It’s humbling to realize that the light we see from some stars began traveling toward us millions of years ago. In every small point of light lies the story of time itself.
Modern astronomy has only deepened that wonder. With even a small telescope, anyone can see Jupiter’s moons, Saturn’s rings, or the soft glow of distant galaxies. Yet, what moves us most isn’t the data or the science — it’s the feeling. Standing under a clear night sky, we sense both our insignificance and our connection to everything.
Stargazing also offers rare quiet in a busy world. When you turn off your phone and let your eyes adjust to the dark, your thoughts begin to slow. You notice the rhythm of your breathing, the coolness of the air, the vastness of space stretching above you. It’s meditation through observation.
Whether you’re in a remote field or leaning over a balcony in the city, looking at the stars is a reminder of perspective. Our daily worries — emails, deadlines, arguments — shrink beneath the cosmic scale. The stars remind us that time is immense, yet every moment we experience under them is uniquely ours.