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Undetectable AI vs. GPTinf: Can They Hide AI Text?

In a world of false positives, AI bypassers serve as your best bet against possible academic sanctions. But they're not created equally. In this article, I'll be reviewing Undetectable AI and GPTinf in depth, so you don't have to.
Updated January 23, 2024
An artificial intelligence rearranging mountains of words, generated with Midjourney
An artificial intelligence rearranging mountains of words, generated with Midjourney

One of the biggest unintended consequences of artificial intelligence is false positives. You probably have at least heard of it by now, even if you have not experienced it directly.

It's when you're accused of using AI because detectors aren't as reliable as some teachers or employers think. At best, you're looking at a stern warning. At worst, you're facing academic sanctions for something you might not even be guilty of.

AI bypassers are one way of safeguarding your work against false positives. However, some of the ones you'll find through Google are either unsafe or ineffective.

Undetectable AI has always been our favorite AI bypasser, but we're always on the lookout to see if anything else is better. That's how we came across GPTinf. So, we put these two bypassers to a head-to-head and assessed their capabilities.

In short: GPTinf is actually pretty good, but I'd still prefer to use Undetectable mainly because it has more options and is more reliable. Here's the full comparison:

What are Undetectable AI and GPTinf?

Undetectable AI and GPTinf are both AI-bypassing tools. Their main goal is to rewrite AI text to the point that it won’t get flagged by detectors. The most common way of doing so is through reworking your sentence structure, increasing diversity in your word choices, and intentionally adding human errors to your text.

What Features Do They Have?

If we’re only comparing features, then Undetectable AI is the clear winner. Not only does it have a robust AI bypasser, but you can also customize the following output parameters:

  • Readability: High School, University, Doctorate, Journalist, Marketing.
  • Purpose or Use Case: General Writing, Essay, Story, Article, Cover Letter, Report, Marketing Material, Legal Material, Business Material.
  • Balance Level: More Human, More Readable, Balanced.
Undetectable AI Features

Undetectable AI also offers free re-rewriting of your text if their initial output gets flagged as AI by detectors. They also aggregate AI likelihood scores from 8 different detectors like Content At Scale, Sapling, and Copyleaks. However, when I independently test them using those same tools, I always find them to be inaccurate.

The last feature of Undetectable AI that I want to highlight is their Human Typer Chrome Extension. This allows you to input text and the extension will type it for you, simulating human typing. You can read more about it here.

Undetectable AI Human Typer Simulation

Moving on, let’s discuss GPTinf’s features — well, feature, since it only has one. Apart from its AI bypasser, the only feature GPTinf has is a freeze list, which allows you to specify which parts of your input don’t need to be modified.

GPTinf Freeze List Feature

Undetectable AI vs. GPTinf: Output Quality

Now, let's talk about their output quality. I'll be judging each of these using two criteria: readability and the amount of grammar errors. For complete transparency, I'll also include the original ChatGPT text I'm using as input, as well as the prompt I used to generate it.

Essay

Original ChatGPT Prompt: Write me a short essay about globalism under 100 words.

Original ChatGPT Text

Globalism, the interconnectedness of nations, transcends borders to foster collaboration, trade, and cultural exchange. In our modern era, technology and communication have accelerated this phenomenon, creating a tightly woven global tapestry. While globalism promotes economic growth and diversity, it also poses challenges, such as inequality and loss of cultural identity. Striking a balance between interconnectedness and preserving individuality is crucial for navigating the complex landscape of globalism, ensuring a harmonious coexistence where the strengths of collective collaboration complement the richness of diverse perspectives.

Undetectable AI

GPTinf

The concept of globalism goes beyond borders to encourage collaboration, trade and the sharing of cultures, among nations. In our world, technology and communication have sped up this process creating a connected global community. While globalism brings growth and diversity it also presents challenges like inequality and the risk of losing identity. Achieving a balance between preserving individuality is crucial, for navigating the landscape of globalism. It ensures a coexistence where the benefits of collaboration complement the richness of diverse perspectives.

Globalism or the interconnectedness between nations smashing the borders to awake trade, commerce, and cultural exchange. In today's day and age, the use of technology and communication encouraged this phenomenon even faster than ever making a tight-knit global tapestry. Thus in essence, globalism works on two levels- it usheres economic renaissance and diversity but at the same time brings with it challenges like inequality and loss of cultural identity. Between interconnectedness and the preservation of individuality rests the key for the managing diversity of globalism to allow harmony of strengths accorded by collective collaboration with richness given by diversity in thoughts.

At first glance, Undetectable AI seems to be more unreadable than GPTinf because of its misplaced punctuations. However, if you take time to read the entire text, you'll find that Undetectable AI, if the punctuations were placed correctly, flows better than GPTinf. For instance, this part from the latter doesn't really make sense to me:

"Globalism or the interconnectedness between nations smashing the borders to awake trade, commerce, and cultural exchange."

If you take the same sentence from Undetectable AI and add a missing comma, you'd get a better result:

"The concept of globalism goes beyond borders to encourage collaboration, trade, and the sharing of cultures, among nations."

Article (Blog Section)

Original ChatGPT Prompt: Write me a short blog introduction under 100 words about water intoxication.

Original ChatGPT Text

Dive into the world of hydration gone awry! Ever heard of water intoxication? It's like a hydration overload - the H2O version of too much of a good thing. Picture this: you're sipping away, feeling virtuous, and suddenly you're in over your head. We'll unravel the watery tale of what happens when you drown in the drink meant to keep you afloat. Spoiler alert: it's all about balance, and we're here to spill the (not too much) water on this quirky quenching quagmire!

Undetectable AI

GPTinf

Delve into the realm of hydration! Have you ever come across the term water intoxication? It's, like overwhelming yourself with hydration. Similar to having much of a thing. Imagine this; you're sipping away feeling healthy and righteous when suddenly you find yourself in a bit of a predicament. Lets uncover the story behind what happens when you become overwhelmed, by the drink that is meant to keep you hydrated. Here's a hint; it all boils down to finding the balance. We're here to provide some insight into this fascinating and slightly perplexing quenching dilemma!

Dive into the world of hydration gone bad! Ever hear of water intoxication? It's sort of like backassward dehydration - overdosing on the H2O version of too much of a good thing. Picture this: with each righteous sip you're taking, suddenly you've bitten off far more than you can chew. We'll unravel the watery tale of what happens when you dive down in the drink meant to keep you afloat. Spoiler alert - it's all about balance and we're here to spill the (not too much) water on this quirky quenching quagmire!

GPTinf's output in this round is far better than Undetectable AI, in my opinion. It keeps the tone of the original text better and successfully replaced an idiom ("in over your head") with another idiom ("bit off more than you can chew") that makes complete sense.

Undetectable AI's output may avoid AI detection, but it still wouldn't pass the smell test. Any person would know that an actual human doesn't write this — it's far too monotonous, and the language is too flowery.

Story

Original ChatGPT Prompt: Write me a short story under 100 words about a convenience store.

Original ChatGPT Text

Amidst flickering fluorescent lights, the convenience store hummed with the hushed rhythm of late-night transactions. Shelves held a mosaic of snacks, each packet whispering tales of midnight cravings. Behind the counter, Sam, the tired cashier, exchanged greetings with the eclectic parade of customers. A student hunting for caffeine, a weary commuter grasping a lottery ticket, and a giggling couple sharing a pack of gum. In this small space, diverse lives converged for fleeting moments. As the automatic doors sighed shut, the convenience store stood as a silent witness to the mundane magic that unfolded in its aisles night after night.

Undetectable AI

GPTinf

In the lit convenience store the soft buzz of late night transactions filled the air. The shelves displayed a variety of snacks each packet whispering stories of midnight cravings. Behind the counter, Sam, the cashier exchanged greetings with a mix of customers. There was a student, in search of caffeine a commuter clutching a lottery ticket and a giggling couple sharing a pack of gum. In this space different lives intersected for moments. As the automatic doors closed with a sigh the convenience store silently witnessed the magic that unfolded in its aisles night after night.

The murmured rhythm of late night transactions bathed the place, abuzz with the flickering fluorescent lights worn with use. Shelves of a mosaic of snacks filled to the brink of bursting held countless packets whispering tales of midnight craving. Sam, the cashier dogged by tiredness, stood behind the counter exchanging greetings with an eclectic parade of customers. A student scrounging for caffeine, a tired commuter clutching on a lottery ticket, the laughing couple with a pack of gum. In this little slice of space are several varying lives that converge for an instant. The automatic doors sighed shut and inside its aisles, the convenience store witnessed the onset of that convenient, mundane magic of night after night.

One thing I noticed is that Undetectable AI and GPTinf has different priorities. The former focuses on avoiding AI detection as much as possible, while the latter is focused on keeping the narrative.

Undetectable AI's version of the story doesn't read like one, instead it feels like the end of the Telephone Game. It's butchered to the point of being unreadable. Let's just say that I wouldn't be telling this tale as a bedtime story any time soon.

On the other hand, GPTinf's version is inferior to the original text, but it still kept the readability and flow of the story. It still feels natural, even though we know it isn't.

Cover Letter

Original ChatGPT Prompt: Write me a cover letter under 100 words for an open barista position.

Original ChatGPT Text

I am writing to express my genuine passion for crafting exceptional coffee and providing excellent customer service. With a background in coffee preparation and a keen eye for detail, I am confident in my ability to contribute to your team's success. I am enthusiastic, reliable, and eager to bring my skills to your open barista position. Thank you for considering my application. I look forward to the opportunity to discuss how my experience aligns with your team's needs.

Undetectable AI

GPTinf

I am reaching out to express my enthusiasm, for the art of creating coffee and delivering exceptional customer service. Drawing from my experience in coffee preparation and my meticulous attention to detail I have confidence in my ability to make a contribution to your teams accomplishments. I possess enthusiasm, dependability and am excited about the chance to apply my skills as a barista, in your establishment. Thank you for considering my application. I eagerly anticipate the opportunity to discuss how my background aligns with your teams requirements.

I am writing this to express my utmost passion in brewing exceptional coffee and giving a good customer experience. With expertise in coffee preparation, criticalness in the eye of beauty, I believe I would bring value onto your team. I am an enthusiastic, dependable and excited to bring my skills to your open Barista position. Thank you for considering my application. I look forward to the opportunity to further discuss how my experience is in line with needs for your team.
 

I'd consider this one a tie. Like with essays, Undetectable AI is more readable than GPTinf, but it also has more punctuation errors. Meanwhile, the latter doesn't flow quite as well because of errors in grammar, like in this sentence: "I am an enthusiastic, dependable and excited to bring my skills [...]"

Marketing Copy

Original ChatGPT Prompt: Write me a marketing copy under 100 words for a whiskey.

Original ChatGPT Text

Savor the extraordinary. Indulge in the rich symphony of flavors with our meticulously crafted whiskey. Aged to perfection, each drop unveils a dance of smoky sophistication and velvety warmth. Elevate your moments with the essence of time and tradition. Unleash the spirit of indulgence - because some pleasures are simply ageless.

Undetectable AI

GPTinf

Experience the exceptional. Treat yourself to the crafted whiskey that offers a symphony of exquisite flavors. Each sip reveals a captivating blend of elegance and smooth, velvety warmth. Enhance your moments with the timeless essence and heritage. Embrace the spirit of indulgence. Because certain delights never fade with time.

Savor the extraordinary. Taste the rich symphony of flavor in our smooth, handcrafted whiskey. Expertly aged for character superior, every sip reveals a smokey, refined complexity and velvety warmth. Elevate your moments with the smoothness of time. Unleash the spirit of indulgence - because some pleasures are simply ageless.

I don't really see many errors with either output. I'm completely satisfied with both marketing copies, but I do think they can be improved a little. For example, Undetectable AI's last sentence could be integrated into the previous sentence with a comma, and GPTinf's line about "character superior" doesn't really make sense to me.

Undetectable AI vs. GPTinf: Which Hides AI Text Better?

Essay

Undetectable AI: Passed. Likelihood of being AI: 33.3%

Sapling vs. Undetectable AI: Essay

GPTinf: Passed. Likelihood of being AI: 0%

Sapling vs. GPTinf: Essay

Article (Blog Section)

Undetectable AI: Passed. Likelihood of being AI: 24.5%

Sapling vs. Undetectable AI: Blog

GPTinf: Detected. Likelihood of being AI: 99.9%

Sapling vs. GPTinf: Blog

Story

Undetectable AI: Passed. Likelihood of being AI: 0%

Sapling vs. Undetectable AI: Story

GPTinf: Detected. Likelihood of being AI: 99.9%

Sapling vs. GPTinf: Story

Cover Letter

Undetectable AI: Detected. Likelihood of being AI: 99.5%

Sapling vs. Undetectable AI: Cover Letter

GPTinf: Passed. Likelihood of being AI: 0%

Sapling vs. GPTinf: Cover Letter

Marketing Copy

Undetectable AI: Passed. Likelihood of being AI: 0%

Sapling vs. Undetectable AI: Copy

GPTinf: Passed. Likelihood of being AI: 0%

Sapling vs. GPTinf: Copy

The Final Tally

USE CASE OR
READABILITY LEVEL

Undetectable AI vs. Sapling

GPTinf vs. Sapling

Essay

33.3%


0%

Article

24.5%


99.9%

Story

0%

99.9%

Cover Letter


99.5%

0%

Marketing Copy

0%

0%

AVERAGE

31.46%

39.96%

How Much Do They Cost?

Both Undetectable AI and GPTinf have two main pricing options. For the former:

  • Monthly: Starts at $9.99 per month for 10,000 words and can extend up to $209 per month for 380,000+ words.
  • Annual Payment: Starts at $5 per month for 10,000 words and can extend up to $104.42 per month for 380,000+ words.

As for GPTinf:

  • Monthly: Starts at $12 per month for 10,000 words and can extend up to $349 per month for 500,000+ words.
  • Annual Payment: Starts at $8 per month for 10,000 words and can extend up to $233 per month for 500,000+ words.

So, What Now?

I've always known about how capable Undetectable AI can be in avoiding AI detection, but GPTinf is a nice surprise. To be completely honest, I half-expected the site to be a scam because of its extremely minimalist design. I'm happy that I took a shot because this is one of the best AI bypass tools I've tested.

For now, I'll stick with Undetectable AI because of its track record and advanced customization features. You don't fix what isn't broken. In the future, if GPTinf continues to improve its backend, I'll give it another go, check if it's finally caught up to Undetectable in terms of features, and then reassess.

If you're interested in learning more about Undetectable AI, I highly recommend checking out our other articles and comparing it to other tools. Good luck!

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Written by John Angelo Yap
Hi, I'm Angelo. I'm currently an undergraduate student studying Software Engineering. Now, you might be wondering, what is a computer science student doing writing for Gold Penguin? I took up studying computer science because it was practical and because I was good at it. But, if I had the chance, I'd be writing for a career. Building worlds and adjectivizing nouns for no other reason other than they sound good. And that's why I'm here.
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