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GPTZero Review 2026: Is This AI Detector Actually the BEST?

The Nerdy Novelist · 2,441 words · 12 min read

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0:00In this video, we're going to be

0:01reviewing GPT-2 which a lot of places on

0:04the internet are calling the best AI

0:07detector out there. We're going to

0:09actually see if that's true with a

0:10number of different tests that I'm going

0:11to run and just review it generally for

0:14pricing and other features besides AI

0:17detection to see what is, you know, is

0:19it a good service? Is it worth the

0:21money? All of that. Now, we all know at

0:23this point if you've been following this

0:24channel that AI detectors are

0:26notoriously bad, but I do kind of have a

0:29reason for wanting to go through and

0:30find which ones are the best ones

0:32because I'm currently building systems

0:34to improve on AI writing in such a way

0:36that it also humanizes it and I want to

0:39find the best AI detector so that I can

0:41properly measure do some of these

0:44automations that I'm creating make a

0:45difference. And GPT-2 is definitely one

0:48that I heard about a lot. You'll hear it

0:50a lot if you search for like best AI

0:52detector out there. It's one of the most

0:54commonly cited ones. So, I thought I

0:56would give it a shot.

1:01So, let's take a look. This is their

1:03home page here and you can actually get

1:05some free AI detection here just right

1:08here in their little window here if you

1:09wanted to test it out. This, however,

1:11will be their less advanced AI detector.

1:15It's not going to be as good as the one

1:17you get when you pay for it. But, let's

1:18look at pricing and there's a couple of

1:20things here. Now, one thing I do like

1:22about GPT-2 is it does have a free

1:24option which allows you to look at

1:2610,000 words per month. So, if you're

1:28just testing this out to see you know,

1:30does it work for my use case or you

1:33barely use an AI detector but

1:35occasionally need to, this is something

1:37that you might want to look at. This

1:38will give you a basic scan, but it does

1:40allow for three free advanced scans per

1:42month. Now, 10,000 words isn't a whole

1:44lot. You'll get through that very

1:45quickly. In fact, just for the test that

1:47I ran for this video, I quickly

1:48surpassed that. So, if that is you, then

1:51you might need to go up to the $12.99

1:53per month that's billed annually and

1:56it's $23.99 when billed monthly. This,

1:58however, gives you 3,000 words per

2:00month, which is a lot closer to what you

2:02would probably need. You get the

2:04advanced scan for all of that. You get

2:05multilingual AI detection. So, if you're

2:08writing in a different language and you

2:09want to detect AI use in different

2:11languages, you get that. And you can

2:13download these AI reports. For the

2:15professional, you get 500,000 words per

2:17month plus everything else in the

2:19premium and then a couple of other

2:21things like scan up 250 files at once.

2:23So, if you have any sort of bulk

2:25scanning needs, you might need this one

2:27for that. But for most people, you're

2:29either going to occasionally use the

2:30free version here or if you really need

2:33something a little bit more substantial,

2:35you get the subscription. Unfortunately,

2:37I don't like subscriptions for this. I

2:38recently reviewed originality.ai. One of

2:41the things I liked about that one is

2:42that they have a pay-as-you-go system,

2:45ala carte. And that's nice because I can

2:47just like pop 20 bucks in there and be

2:49like, "Okay, I'll just use this when I

2:50use this." And then, you know, that way

2:52I don't have to worry about did I go a

2:54whole month without even using this tool

2:56at all? And you don't have to worry

2:57about monthly recurring expenditures

3:00adding up along with all of your other

3:03author tools and Netflix and Disney Plus

3:05and all of these things. So, that's one

3:07of the downsides, I think, of GPT-3 is

3:09that there is no ala carte option like

3:10there is with originality.ai.

3:12Still, $12.99 I'd say is probably a

3:15reasonable amount for what this does. Of

3:17course, you have to get the annual

3:18version to do that, a little over $130.

3:22So, that'd probably be about $150 or so.

3:25I'm just doing some quick math in my

3:26head. All right, so that's GPT-3. So,

3:28what does it look like when we actually

3:30log in to GPT-3, especially if you have

3:32a advanced account? Well, it's going to

3:34look something like this. You can come

3:36here if you have multi-file upload

3:39thing, you can do that here. But most of

3:41the time, you're just going to go here

3:42and say new scan and then paste your

3:44document in here or you can upload it

3:46from Google Docs or just upload a Docs

3:48file or something like that, which is

3:50nice to have all of those different

3:51options to upload your documents,

3:54especially if you have really long

3:55documents like you have a whole book or

3:57something that you want to check, you

3:58could do that. Of course, that's going

3:59to use up your credits real fast, but

4:01you can do that. Anyway, you just paste

4:03your thing here and then you select what

4:04kind of scans you want to do. And one of

4:07the things I like about GPT-3 is they do

4:08have a lot of options here just besides

4:11AI detection. Of course, they have their

4:13advanced AI scan, which is what I was

4:15using for all of all of my tests. They

4:17can also text for plagiarism checking,

4:20for AI hallucinations. It could be

4:21really useful if you want to like go

4:24through and check the claims that are

4:25made. And this will actually, I think,

4:27also help you find sources, which is

4:29nice. You can even ask it to do this to

4:31give you writing feedback to help you,

4:34the human, to be able to incorporate

4:36feedback and improve your text, which I

4:37thought was also a really nice thing. Uh

4:39there's also this create custom reviewer

4:41option, which I thought it was

4:42interesting, but I'll get to that in a

4:44little bit later. Quick pause. If you're

4:45an author who wants to start writing

4:47more books, I put together my complete

4:49AI prompt pack that helped me and many

4:51others in my community write a book in a

4:53month. It's completely free. Hit the

4:54link in the description, join the free

4:56wait list for Story Hacker Gold, then

4:58you just answer a couple quick

4:59questions, and I'll send you the full

5:01prompt list plus a few extra free

5:03goodies. I'll also email you when I open

5:05the paid Story Hacker Gold group so you

5:07can join if it feels right. There's no

5:09commitment to join though, and you'll

5:10still be able to get all of the freebies

5:12you signed up for either way. All right,

5:14back to the video. Anyway, actually no,

5:16let's get into it now. So, you can get

5:17it here on the left here, you can go to

5:19custom review, and this allows you to

5:22create essentially a feedback avatar.

5:26So, let's say, you know, a lot of people

5:27using GPT-3 are instructors and

5:29teachers. So, let's say we want them to

5:32have like a an emphasis like a teacher

5:35with an emphasis in American literature

5:36or something like that. Then you can put

5:37that in here. You can attach files, so

5:40it has things like rubrics, score

5:42sheets, criteria, writing it so it could

5:44know what the writing assignment is. All

5:46of this stuff very useful, I think, if

5:47you're an educator, because basically

5:49what this does is it allows AI to grade

5:53papers.

5:54To grade stuff that was given to you by

5:57your students. And I think it's kind of

5:59ironic because this tool seems to be

6:01really targeted at educators. I think

6:03it's kind of ironic that we have a tool

6:05that is designed to detect if a student

6:08has used AI in their homework, while

6:10also offering the educator a chance to

6:13use AI for their homework, which is to

6:15grade papers and other documents, other

6:17assignments. Because you can do that

6:19with this tool. You can absolutely take

6:21all of your stuff, if you're a teacher,

6:23plop it in here, and let it do the

6:25grading for you. Now, I actually don't

6:26think that's a bad thing. If you have a

6:28really good rubric and the assignments

6:30are very well spelled out, I think I

6:32would actually want the AI to do the

6:35grading instead of a human most of the

6:37time. I would trust an AI to do that

6:39better. The reason is, first of all, it

6:41has to have a good rubric and clearly

6:44defined goals and criteria. But, here's

6:47the thing. Humans, especially when it

6:48comes to something like grading papers,

6:50as someone who uh was an English major

6:52and had a lot of papers criticized by a

6:54lot of different teachers, it's so easy

6:57for like every teacher is different. I

6:59could submit the same quality of work to

7:00a bunch of different teachers, and it'd

7:02all be different. And, you know, and

7:04sometimes teachers have bad days,

7:05they're really tired, they've got a lot

7:07on their plate, maybe they're just

7:08having a bad day and they're extra

7:10critical that day. I actually think, and

7:12I know I'm getting kind of philosophical

7:13here, but I actually think AI would be

7:15more objective. And if you have your

7:17rubric straight, they could actually be

7:19pretty accurate, too. And I think a

7:21teacher is better off focusing more on

7:23the teaching. I don't get much value out

7:25of a teacher grading my papers. I get

7:27more value out of the instruction that

7:28they give me, uh either face-to-face in

7:30a classroom setting or one-on-one. Like,

7:32that's the kind of thing that is

7:35meaningful, like mentorship from this

7:37person. But, the actual day-to-day

7:39grading of stuff, I think AI's fine for

7:41that. Anyway, I'll get off my

7:42philosophical soapbox there, but I just

7:45think it is kind of ironic that we have

7:46this tool that will help you grade

7:47papers while also making sure that the

7:50students aren't using AI because of

7:51course that's wrong. Anyway, let's go

7:53into the actual detection and results

7:57from all of the different prompts that I

7:58gave it. So, I gave a bunch of different

8:00AI and human samples to kind of see how

8:03well it does cuz I want to look at does

8:05it detect AI well enough? Does it have

8:07false positives? That sort of thing. And

8:10so, first of all, I had gave a pure AI

8:12fiction piece and it came back at 66%

8:15likely AI. So, or at least 66% of it is

8:18likely AI. This is inaccurate. The whole

8:21thing was 100% AI, so you would expect

8:23it to be 100% AI. Interestingly, over

8:26here I have a more heavily edited work

8:29of AI. So, a chapter that was completely

8:31written with AI, but then went through

8:32several editing passes with more than

8:34one human where almost every sentence

8:37was modified in some way by one of the

8:40humans, right? That one it thought was

8:4287% AI. So, I think it's funny that the

8:44100% AI was 66 and the heavily edited AI

8:48was 87. This is consistent although with

8:51what I got out of originality.ai which

8:53was 64% for the pure AI and 100% for the

8:56heavily edited AI which was surprising

8:58to me. This one is more accurate because

9:00it got a little bit higher on the pure

9:02AI and a little bit lower on the heavily

9:04edited AI cuz I'd have expect more like

9:0650% or so for the heavily edited AI. We

9:09had a pure AI a nonfiction piece and

9:12this one it got a little bit more

9:13accurate. It was at about 95% was its

9:16estimation. And the thing I've found

9:18already a bit with these two tests that

9:20I've run so far with originality.ai and

9:22GPT-2 is that nonfiction seems to get

9:25flagged more often as being AI. Because

9:27let's move on to this next couple here.

9:29I have a human written piece, completely

9:32human written and it flagged none of it

9:34as AI. So, it got this part correct.

9:36That that part was not AI. Then I had

9:38human-written nonfiction that was

9:40completely human-written. I know for

9:42sure because I wrote the article in

9:44question here, and I wrote it the

9:45traditional way before AI came around.

9:48And GPT-2 flagged that as 53% AI, which

9:52is an improvement on originality.ai,

9:55which flagged it as 99% AI. But still, I

9:58would have expected zero because there

10:00was zero AI in the formation of this

10:02particular article. So, while it did

10:04better here than originality.ai,

10:06it's still way off for nonfiction as

10:09opposed to fiction, which it generally

10:10got. And then I gave it some Sherlock

10:12Holmes text right here. That's what this

10:14column is. And then also a segment from

10:17the Bible. And both of those it

10:19correctly got that there was zero AI

10:21involved here. So, overall, I think this

10:23is actually pretty good so far. I've

10:26only reviewed two of these, but so far

10:28GPT-2 is does appear to be the more

10:30accurate of the two across several of

10:32these benchmarks. And I'm going to go

10:34ahead and add more of these as we go

10:36along with these reviews. But as far as

10:38my overall thoughts on GPT-2, if you're

10:40an educator, it seems to be a good bet.

10:42Things I don't like about it is I don't

10:44really care for the pricing structure.

10:46Although it is fairly standard, I still

10:48don't care for it. I think if you're not

10:50an instructor, not a teacher, it lacks

10:52some features that I would want.

10:54Originality.ai, for example, had more

10:56features leaning towards those who are

10:58SEO content creators and that kind of

11:00thing, online articles. And some of

11:02those would be really handy to have

11:03here. But at least it does check for

11:05hallucinations and plagiarism. It gives

11:07you writing feedback. It has the AI

11:09scanning, of course. And all of that.

11:10Obviously, the most important thing is

11:12how accurate is the scanner. And it

11:13seems to be pretty good so far. Although

11:16still certainly not perfect as I think

11:19we can expect for all of these. So,

11:21those are my thoughts on GPT-2. Let me

11:23know your thoughts working with this in

11:24the comments if you've worked with GPT-2

11:26before. And I will see you in the next

11:28video.

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