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Jake Castronakis
Hello and welcome to the vergecast, the flagship podcast of homegrown human writing. I'm Jake Castronakis, executive editor of the Verge, and today we're talking about AI detection and the one system that might actually work. I have been on the hunt for a reliable AI text detector for a while now, and I know I'm not alone. Here's a call we recently got from a listener.
Max Spiro
Hey, my name's Aiden. What do AI plagiarism or AI text detectors measure? Are they reliable? Can they reliably detect AI generated text? Recently there was an article at my college newspaper and it's 100% AI generated, according to ChatGPT. I told the publication and they refused to take it down, stating that AI detectors are not reliable. Thank you.
Jake Castronakis
By for the longest time this has been the refrain AI detectors aren't reliable. So maybe a student's paper or an executive's LinkedIn post looked like AI, but there wasn't a surefire way of knowing that might be changing. Because now the thing I keep hearing is AI detectors aren't very reliable. But Pangram says it might be AI. So today we're talking to Max Spiro, the CEO of Pangram, which makes what might be the first trusted AI text detector on the market. We're going to talk about how it works, how much we can trust it, and what we should do with its findings. But first, here's what's happening on the Verge today. This is 90 seconds on the Verge for Thursday, July 16, 2026. OnePlus is exiting the US and Europe. The company made the announcement today, 12 years after first making a splash with the OnePlus One. This is a real bummer for smartphone fans. OnePlus had its ups and downs, but the company genuinely was a pioneer in low cost, high spec devices that could go head to head with the big flagships. To David Amell has a great piece on the Verge today about how the US carrier system is a big part of what killed OnePlus. Its prices may have been great, but they never looked that great beside an iPhone that only cost $4 a month on contract. Next, the EU is forcing Google to make Android open up more in Europe. The European Commission said today that competing AI assistants need to get the same level of access as Gemini. That means letting them be activated by voice commands and giving them the ability to control apps. Google argues that this presents security and privacy risks, but as of now, it's on the hook to make it happen by July 2027. The EU is also updating rules requiring Google to share search data with competitors in Europe. That now has to include AI chatbots. Finally, do you want a couple companies to be able to dominate U.S. airwaves? FCC Chairman Brendan Carr does. He's planning a vote to end the national ownership cap, which currently prevents broadcasters from reaching more than 39% of U.S. households. Instead, he wants to be able to review and approve deals that would violate the cap on a case by case basis, letting the F consider factors such as quote viewpoint diversity. Huh. Fun fact. The 39% cap is in fact enshrined in law, so this is definitely going to end up in court. Another win from the car FCC. You can read more@theverge.com that's 90 seconds. On the verge for Thursday, July 16,
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Jake Castronakis
all right, we have Max Spiro, CEO of Pangram. Max, thanks so much for joining us. I'm really interested in talking about what you guys have been building.
Max Spiro
Yeah, thanks so much for having me really excited.
Jake Castronakis
So there have been these AI authorship debates for a couple of years now, and earlier this year I started to notice them playing out a little bit differently. I feel like it was always people saying AI detectors aren't reliable. They aren't reliable. And then suddenly people were saying, well, Pangram says this is AI, and this tool had emerged as a name that people actually trusted. So my question to you is, what happened there? And how did Pangram, at least from my perspective so quickly, get this reputation as a trustworthy name in AI detection
Max Spiro
It's funny, for me, it doesn't feel at all like we gained it quickly. So I think we've been around for almost three years now, but I think for the first two ish years of our life, we were just fighting this narrative on AI detectors don't work. We were publishing papers, publishing technical reports. Um, and then I think we like, slowly were embedded more in the research community. And then we had a couple like, big name researchers who decided to benchmark Pangram and publish results. And I think that's when people started to realize, like, oh, these guys are legit. They're not just like lying about their accuracy. They're, they're, they're real.
Jake Castronakis
So did you start out as purely a research product before productizing it, or at what point did you get the model that kind of cracked it and went, oh, this is, this is reliable enough that kind of want to brag about it?
Max Spiro
Yeah, I mean, definitely it was like just research at the start. It was just me and my co founder. We both have like AI and machine learning backgrounds and we're just like, this sounds like a fun problem to try and crack. It seems like nobody has really cracked it to the degree of accuracy that people need or want. And so it took us probably, I think, a bit over a year to get our first version of the model that really had this flagship false positive rate that was significantly lower than everyone else. Early on it was a 1 in 1,000 false positive rate, so 0.1%. And now today it's 1 in 10,000, which is 0.01%. And I think that's confidently low enough that people are able to confidently point at Pangram results and be like, oh, this is what it says.
Jake Castronakis
So why don't we back up to that? What is the approach that you took that got you to that 1 in 10,000 false positive rate that you guys are advertising?
Max Spiro
So it's a method in machine learning called active learning. Essentially what happens is we take a model that's okay, it's decent, and then we say scan this really, really large corpus of human written text and find out which examples we have errors on. And what this essentially does is it finds examples that are close to the boundary between human and AI, and then we take those and then we say for each of these documents, say it's like a Yelp review on Denny's, then we'll ask AI to also create a Yelp review about Denny's in the same style. And then so now we have a human side and then an AI Synthetic mirror. And so we train on the human example plus the AI synthetic mirror. And our model is able to learn the difference in stylistic choices between these two examples.
Jake Castronakis
How did you tap into that? Where did that idea originate from?
Max Spiro
From these core machine learning ideas where you want as large of a data set as possible and you want as diverse of a data set as possible. So I think that's sort of how we landed on synthetic mirrors, because otherwise, if I just ask AI for 10,000 essays, I'm going to get like 9,000 essays that sound like very, very similar. So instead, what we have to do to diversify our data is to have the AI essays mirror a human essay.
Jake Castronakis
So that's really interesting. So you're getting this huge body of human work. You're then mirroring that with AI versions and training it on the trickiest subset of the ones that your detector can't always tell the difference. Is that right? And looking for distinctions between how a human writes and an AI writes.
Max Spiro
Exactly. Yeah. And training on these hardest examples is a really important part of it as well, because otherwise there's just not enough signal for most pieces of text. It's actually very obvious to the detector if it's human or not. Is it riddled with typos? Is it messy or personal? And so by looking for these edge cases where it maybe plausibly could have been written by AI, we get much higher signal on what are the actual AI signals.
Jake Castronakis
So there's a really interesting thing there where. So Pangram itself is using an AI model to assess AI text. And I've used your. Your service, and you have this feature where Pengram can kind of flag parts of a body of work that believes are signs that tip it off as being something that was written by AI. But at the same time, you guys have this sort of warning or this caveat saying, oh, actually this isn't what the model is looking at. We don't really know what the model is looking at. Am I understanding that right? So it's. The model is sort of a black box. Like you guys can't quite tell what is triggering it to tell what is AI and what is human.
Max Spiro
Yeah, I think usually it's like a more holistic story than the clean story is like, oh, this sentence tips us off that it's AI. But the actual answer is that the model's really looking holistically at the document and there's a whole bunch of microdecisions, that each microdecision alone is a decision that AI would have made. And a Human wouldn't have necessarily always make that decision. But when you aggregate all of these micro decisions together, you can have high confidence that the document was AI generated. So, yes, the things in our dashboard, we have some supporting evidence. We've mostly taken these from the Wikipedia signs of AI writing, and we just kind of show these to people as a way to personally train yourself on how to detect AI writing.
Jake Castronakis
Is that saying that you, Pangram, despite being the flagship AI detector, you don't have your own signs of AI writing? You're relying on Wikipedia to kind of turn it into something that is English readable to people?
Max Spiro
Yeah, in a sense, yes. I think the English readable side is the hardest thing. We've been doing some really interesting work. This field of research is called interpretability. And so in our case, we are looking at what neurons in the Pangram neural network are activating when it sees AI, and how does it cluster AI text differently from human text? So we had a pretty cool blog post that we put out recently where we found that even though we're not training the model specifically by saying this AI text is from Claude and this AI text is from ChatGPT, our model still learns what model family the text is from and is able to do a pretty good job at clustering text from different models separately.
Jake Castronakis
You know, one thing I'm curious about too, is I've seen people go to ChatGPT or go to Claude and ask them to assess whether writing is AI, because those things are. They are AI. They generate AI. And my impression is that those things have zero capabilities specialized for this whatsoever. But there are other specialized AI detectors out there, and those are the ones that I guess have not developed this reputation of reliability. I'm curious, do you have a sense of what they're doing wrong or not doing that isn't giving them this success rate?
Max Spiro
Yeah. So a lot of the early AI detectors, certainly we were not anywhere close to the first, but a lot of the early ones relied on research which said that there's this metric called perplexity, which might be a good method for detecting AI text. This is a measure of how surprising a piece of text is to a language model. So if you take the sentence like the boy ate a bowl of soup, that's pretty low perplexity. Every word is expected, whereas if you have a sentence, the boy ate a bowl of spiders, spiders would be a high perplexity word because that's not expected. So if you look at the way AI language models are trained, they're trained to produce Low perplexity, unsurprising sentences. Because if it's surprising, it's more likely that it's wrong. So you can build an AI detector that measures perplexity of a text and says if it's low perplexity, it's AI, and if it's high perplexity, it's human, because humans write in a more surprising way. This breaks down, however, in a couple of cases. So any text that is memorized by the AI is going to be low perplexity, for example, like the Declaration of Independence. So if you're wondering why you put the Declaration of Independence into some random AI detector and it says it's AI, that's why. It's because it's low perplexity, the AI model has memorized it. The other issue with it is English language learners also write in simple language, which is low perplexity, which then gets flagged as AI by these detectors. So that's sort of the problem with these early detectors and the problem with perplexity in general is it's not really a metric that can be improved upon. It just is what it is. It's like measuring, I don't know, like the density of a liquid. Like, like it is just a single metric. There's no, like, improving upon it.
Jake Castronakis
Got it. And so just to break those apart, the old style of detector with perplexity, they're essentially looking at how, how homogenous a document is. Whereas Pangram, perhaps to simplify you, you have trained on the specific patterns in AI text.
Max Spiro
Yeah, we're sort of like learning the micro decisions that these AI language models make consistently.
Jake Castronakis
So I guess, big question. If I see a Pangram result, and I see a lot of them these days, should I trust it? Right. How should I think about a Pangram assessment?
Max Spiro
Yeah. So, I mean, I think Pangram is very accurate, of course, but what most of our benchmarks say is the false positive rate is 1 in 10,000. So, um, look, there's a chance that it could be wrong. Hundreds of thousands of things are scanned by Pangram every day. So, like, there's going to be a few errors. But I think the longer the text is, the more confident we can be that it's correct because we just have more, more data. So if, if it's like a 50 word tweet that's flagged by Pangrama's AI, like, it's most likely correct, but I think there's like greater error bars on how much of it was AI. Was it actually just AI assisted? Whereas if we're looking at like a 80,000 word novel and Pangram says this thing is 90% AI. Like we're very confident that it's at least 90% AI. That's a majority AI written for sure.
Jake Castronakis
I've noticed your tool is able to do that where it will give some. It'll tell you how confident it is in a result. I was messing around with it and kind of interspersing human written text and AI written text. And there was one big chunk that was kind of 50 50. And Pangram told me it was like low confidence human written. Whereas there are other times I've seen it tells me, you know, it thinks that something is partly human and partly AI. So how are you coming to that decision when you are deciding? Oh, I see bits of both in here.
Max Spiro
Yeah. So a lot of what we're doing is we're scanning the document first off holistically, but also like in parts. And we're saying like, let's look at this part and does this part look like AI or human or assisted? And then for each part we kind of have a score and then we are going to staple these together and aggregate them and say like. Well, we looked at 20 parts of this document and like 10 of them look like they're AI. So we can say it's about like 50% AI.
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Jake Castronakis
Today, the big scandal recently around, I think AI detection was there was this Commonwealth prize. They awarded a big short story prize to a piece called the Serpent in the Grove. A lot of critics published thought it read like AI. Panagram assesses it as 100% AI generated. But the author, Hamir Nazir, he insists he wrote it himself. He just was interviewed by the Atlantic. He said, oh, you know, I used voice to text to actually write this story. And maybe that created some linguistic oddities. I. I'm curious how you think about that.
Max Spiro
I am very skeptical of his claims. First off, I think just my personal intuition. It just reads total AI. It reads, you ask ChatGPT to write a literary prize winning essay, and this is what it would say, which is kind of vapid and has a bunch of empty metaphors and is fake, pretend, deep. At least that's my read on it. I really don't want to be too critical of the guy, but I think there were also a lot of inconsistencies in the interview, which also make me suspicious. For example, he was asked what his favorite author was. He mentioned a couple authors, and then the interviewer asked, hey, okay, what's your favorite piece from this author? And then he's like, I can't actually remember a piece from this author. Which is very. I think that lights up some, like, some alarms for me of like, is this person really just, like, bullshitting or did he actually spend a lot of time on it? Also, I think, like, the speech to text is kind of surprising to me. Like, I don't see how that would trigger Pangram unless you took speech to text, um, like rambled for five minutes or whatever, and then asked AI to turn that into a coherent essay.
Jake Castronakis
That sort of gets at something interesting where part, part of the evidence here is first people read it and people who are really familiar with AI writing said, I'm noticing some things here. Then people ran it through Pangram and Pangram said, yeah, we think this is AI. And then people asked him and kind of assessed the evidence that he provided. And some of some parties, you know, I think including the prize board, found it compelling. I think other parties perhaps, I don't know that the Atlantic issued judgment, but certainly suggested some skepticism as part of that interview, which I think is. Is pretty well warranted. You know, it's interesting, Granta, which ran the story, said that it asked Claude to assess whether the story is AI and I believe Claude said that it wasn't. And I think that's a very reasonable approach if you listen to all the leaders of these AI giants who are saying they've built super intelligence. But we both know that this is, you know, this is a specialized skill to detect AI writing. And that check was in all likelihood, like, probably basically useless. I'm curious. You run this program that is supposed to be reliable. Who is using Pangram right now? A lot of industries seem to be completely unprepared or unaware at this point of how to assess AI writing.
Max Spiro
I think it's really only been in the last six months where I think the tides have really turned against AI writing. I think for a while, people were holding out and saying, well, you know, maybe like, AI writing is going to become more common and is going to be generally accepted. And now we're realizing, like, oh, there's actually a lot of use cases beyond our initial ones. So who's using Pangram? I think, like, there's a very big cohort of educators and schools and universities who use Pangram to check if a student is cheating on an assignment, if they're using AI to fully generate their essays, et cetera. I think we also have users in publishing. Either they have, like, a magazine or they're an agent or something like that, and they want to use Pangram to just make sure that everything they are going to publish is above board. We also have AI companies who use Pangram to make sure their data is clean. For example, you don't want to pay an expert to write up some data or write an explanation or solve a problem, and. But actually, instead of doing that, they're just feeding it into ChatGPT and then sending it back to you. So. So I think that's been a growing business as well.
Jake Castronakis
That is a wild problem of their. Their own creation.
Max Spiro
It's true.
Jake Castronakis
I. I'm, I'm curious. What, what do these deals look like for you? Do you have a specific, you know, product for these companies or for educators? Or is it just come on in, buy a bunch of Pangram credits, and scan away?
Max Spiro
Yeah, we. We try to bring Pangram to where people are at. So, like with higher ed, they use a learning management system called Canvas, typically. And so this is where students will submit assignments and receive grades. And so we integrate directly into Canvas to automatically score assignments with Pangram and then just show that to the instructor. And so kind of similarly, we work within people's content management systems, and wherever they work, we're trying to bring Pengram there.
Jake Castronakis
If I'm a professor, what should I do. If I get a positive result, do you think that that's enough to fail a student?
Max Spiro
I mean, I think the first step is always talk to the student. I think the reason that somebody would use AI, it's like a symptom of a deeper problem. It's either the student didn't have enough time to complete the assignment, they didn't feel like they had the understanding to complete the assignment, or they don't care about your class enough. And so I think all three of these are like something that you probably want to dig into deeper rather than just like giving a zero.
Jake Castronakis
That's a very polite way of saying, though, you think the assessment is correct and they should chase that down.
Max Spiro
I mean, I see this all the time where, like educators, they get better results if they do something beyond giving a zero when they suspect AI use. Because I think that doesn't really, like, solve the core of the problem, which is that this student feels incapable of producing an assignment.
Jake Castronakis
Well, and I think this has been a big problem in education, and there are a lot of professors who are very unhappy about just how much AI has invaded college campuses. And it's a very, very tricky thing to combat. There's just no world in which people are going to stop using it wholesale.
Max Spiro
I see this learned helplessness not just among students, but even among professionals who feel like, oh, AI could write a better email than me, so why would I ever write an email myself? And I think this kind of comes from a place of insecurity. But yeah, also it's just like it's kind of concerning. If you have ChatGPT write all your emails, then you're never going to be able to write a decent email yourself.
Jake Castronakis
Yeah. And at the same time, I think for college students, you know, if you believe that everyone else is getting A's from using ChatGPT, you know, you're in sort of this impossible arms race. But you're right, like, you're not going to learn if you only ever use these tools. And so I think having any line of defense against this stuff for professors or really any professional in a workplace who needs genuine human work is really, really very important. I'm curious whether your job gets harder as time goes on, because these models change all the time. And I'm curious if you think they will evolve in ways that get harder to detect. I'm also curious, you know, you have to train on human writing. How do you guarantee that you're getting human writing and fresh human writing?
Max Spiro
Yeah. Okay, a lot to unpack here. So I do think models have gotten much more capable in the last six to nine months. I think they've gotten much better at using their context and using a lot of context. So we've gone from a really short question to ChatGPT to instead people who are writing essays with plot code. Let's do a deep dive on the Strait of Hormuz and the Iran situation. And then Claude will go do a bunch of research, make a bunch of web calls, write down a bunch of contexts, and then compile a big essay. And so even though all of this is autonomous, it's using a lot more of its context and so its output is much more detailed than you would have previously expected. And so part of our job is trying to understand what AI writing looks like in this new paradigm where these models are much more capable. And then the other side is the human side. I think a lot of our human data today comes from the pre2022 Internet, pre ChatGPT, where we know for sure that most text was written by AI. And I think there's like, what we're looking at today is like, if we're going to use a data set from 2026, we need to be incredibly certain that it's not contaminated and there's not AI or ChatGPT outputs in there.
Jake Castronakis
Is there a future where you are paying people to sit in a room at a notepad and handwrite essays in order to get like true human output?
Max Spiro
We've literally discussed this. We've talked about, like having an essay contest or something, but we have to like, supervise you to make sure that what people are writing legit. I think we've landed on some, like, simpler lower tech solutions, like just looking for trusted writers and sources that we believe are either not using AI or using AI in a way which we don't think we need to detect. For example, I'm just going to ask Claude. This idiom's on the tip of my tongue and so I'm going to ask Claude for some wording suggestions. I think that's totally fine. And we don't want that to be flagged as AI.
Jake Castronakis
That's interesting. So when you say trusted sources, you mean the New York Times or what does that look like to you?
Max Spiro
Yeah, I think that means professionals who write and who have a history of writing before AI. So I think if we're looking at books, for example, there's a lot of authors who have been prolific and published a lot of novels before AI. And then there's some that suspiciously started putting out three or four books a year starting in 2024, and they just self publish on Amazon, and those are the ones that we want to avoid.
Jake Castronakis
Are you working directly with any of those authors who you trust?
Max Spiro
Not today. I think this is a really ongoing question for us of making sure Pangram still works as well on 2026 human written content as it does on 2020 human written content. And so I think we're going to have some interesting projects around that later in the year. But it's mostly just if we do our job right, then it's invisible. Then Pangram continues to work and nobody really notices.
Jake Castronakis
So what does come next for Pangram? We were chatting before we started recording and you mentioned there might be some advancements coming soon.
Max Spiro
Yeah. So we have some interesting models that are in the oven. I think I'm most excited for our next release for our text model, which is going to do much better on humanizers. There's this whole crop of tools on the Internet called humanizers, which people can use to basically cheat to have an AI model paraphrase your AI text in a way that it doesn't trigger an AI detector anymore. And so this has been kind of an adversarial battle. But our new model is going to be much, much better here. And it's also going to be better at understanding the degree of AI assistance in a piece of text.
Jake Castronakis
That's fascinating. It takes a remarkable dedication to laziness to make an AI essay and then run it through another AI program to hide that you ran it through AI in the first place.
Max Spiro
It's a big business, actually. There's so many of them out there and they, they astroturf read it. And I think they're just kind of like some of the scum of the earth. They're the worst of the worst.
Jake Castronakis
So do you have to train on their outputs specifically?
Max Spiro
Yes, we do. So we ran a big data collection campaign to collect a lot of data from these humanizers. And then what we did is we built our own internal humanizers that mimic what these external humanizers do. So we could go from a small amount of data to a large amount of data. And then we train our model on it.
Jake Castronakis
Long term, I think tools like this are going to be essential for the world to be able to tell what is human made and what is not. How do you think about turning Pangram into a real sustainable business? And are you worried that one day Google goes, this is important. We're just going to add a little button to Chrome and poof, that's that.
Max Spiro
If Google does this, I'm happy, then my work here is done and the problem is solved. I think there's a lot of competing factors here. How I think about Pangram in general is we are building this core technology, this core infrastructure for a future where we have these powerful generative AI models. If ChatGPT stopped existing and Claude and all the others, then we wouldn't have a business. But I think they're going to stick around and they're going to continue to have societal effects that we need to solve.
Jake Castronakis
So how do you make sure that Pangram lasts? You think that this is just going to be essential enough of a business that people will keep coming to you?
Max Spiro
I think so. I genuinely think we're really well positioned. Because it's such a hard problem and because these AI models are always improving, we also have to always improve. And so I think it's a bit of a winner takes all scenario where if we have the best technology and we're building technology that improves faster than the others, then we could keep up when these other AI detectors that already kind of don't really work that well are just going to stop working completely.
Jake Castronakis
I wanted to ask one last question, which is on the website formerly known as Twitter. You're. Your bio says that you are a slop janitor. You know, your whole startup is about spotting AI. You've spoken throughout this interview. I think you know somewhat derisively of AI generated text. I'm curious, you know, are you opposed to AI writing? Do you think there's a place for it? And maybe most importantly, what to you qualifies as slop?
Max Spiro
I think there's a place for AI generated text. I think, especially if it's properly disclosed, I think there's not a problem. It's a great tool for synthesizing information and providing it in a clean and readable format. But what I really don't like is when people are dishonest about AI content. When people say, I wrote this myself and it wasn't written by them, it was written by ChatGPT, that's where I feel like it's dishonest. I think there's the other side of it, where AI content today is significantly worse than human content in a lot of ways. It's lower information density, it's optimized to be easy to read and pleasing rather than to actually effectively get ideas across. But I think as we, no matter how far into the future we look, this, this core concept of writing being proof of thought is not going to disappear. So if I want to really think about a concept, then I could write about it. I can workshop and edit my writing and then ultimately I'm going to have something that's really concise and talks about my opinion in a way that I'm happy with. Whereas if I'm instead asking ChatGPT to generate a piece on my writing, then I will just simply not have thought about it as deeply. So I think the problem of using AI to kind of be this cognitive offloading tool where AI will do the thinking instead of you, I think this is just going to be a problem in perpetuity.
Jake Castronakis
That's interesting. So your distinction is less about the text and more about whether there was real human thought behind what goes into it.
Max Spiro
Definitely. Yeah.
Jake Castronakis
I think that's a useful explanation. Cool. Well, Max, I'm glad somebody is diving into this very hard problem. I appreciate you joining us.
Podcast Announcer/Host
Cool.
Max Spiro
Thanks so much, Jake.
Jake Castronakis
That's it for the Vergecast. Remember to subscribe to the Verge for ad free episodes, exclusive newsletters and a whole lot more@theverge.com we'd love to hear from you. You can email us@vergecastheverge.com or call the hotline 866. Verge 11 Shout out to everyone who's still demanding the thunder round in the comments. I see you. I hear you. One day we'll return. The Verge cast is a production of the Verge and Vox Media Podcast Network. Today's show is produced by Josh Kahas, Eric Gomez, Brandon Kieffer, Travis Larchuk and Aaron Locasio. We'll see you tomorrow.
Max Spiro
I'm Neil Apitel, editor in chief of the Verge and Decoder is my show
Podcast Announcer/Host
about big ideas and other problems. Today we've got the first of a two part series on the systems that run the world. I'm talking with Bart Butler, the CTO
Max Spiro
of Proton, a company that makes private and secure productivity software.
Jake Castronakis
It's impossible to create a backdoor that
Max Spiro
can only be used by the good guys.
Jake Castronakis
No company is going to go to jail for you.
Max Spiro
Often the response is, well, if you change the legal foundation here, we will leave.
Jake Castronakis
Yeah.
Max Spiro
How real is that?
Jake Castronakis
It's dead serious. With all due respect to Swiss authorities and everybody else, I think it would be suicidal to continue down this path.
Max Spiro
Subscribe wherever you get your podcast.
Podcast Announcer/Host
This series is presented by Comcast Business.
Date: July 16, 2026
Host: Jake Castronakis (Executive Editor, The Verge)
Guest: Max Spiro (CEO, Pangram)
This episode of The Vergecast takes a deep dive into the evolving field of AI detection tools—highlighting Pangram, an AI text detector that has quickly gained a reputation for reliability. Executive Editor Jake Castronakis interviews Max Spiro, Pangram’s CEO, exploring how the tool works, why it’s trusted, ongoing challenges, and what the future may hold for AI authorship detection.
For years, the refrain about AI text detectors has been that they’re unreliable.
Pangram has rapidly gained traction and trust in the community.
Jake observes a shift in conversation:
"It was always people saying AI detectors aren't reliable. They aren't reliable. And then suddenly people were saying, well, Pangram says this is AI, and this tool had emerged as a name that people actually trusted." (04:41)
Max explains Pangram’s gradual acceptance:
"We've been around for almost three years now, but... for the first two ish years... we were just fighting this narrative on AI detectors don't work. We were publishing papers... and then we had a couple like, big name researchers... benchmark Pangram and publish results... that's when people started to realize... these guys are legit." (05:15)
"The model's really looking holistically at the document and there's a whole bunch of micro-decisions... you can have high confidence that the document was AI generated." (10:33)
[21:59]
"It just reads total AI. It reads, you ask ChatGPT to write a literary prize winning essay, and this is what it would say, which is kind of vapid and has a bunch of empty metaphors and is fake, pretend, deep." (22:38)
[27:43]
"The reason that somebody would use AI, it's like a symptom of a deeper problem. It's either the student didn't have enough time... they didn't feel... understanding... or they don't care about your class enough. All three... are something that you probably want to dig into deeper rather than just like giving a zero." (27:49)
"If we have the best technology... we could keep up when these other AI detectors... are just going to stop working completely." (37:11)
[38:09]
"AI content today is significantly worse than human content... lower information density, optimized to be easy to read... rather than to actually effectively get ideas across... Writing is proof of thought... if I'm instead asking ChatGPT to generate a piece on my writing, then I will just simply not have thought about it as deeply." (38:09)
On the “Black Box” of AI Detection:
"We don't really know what the model is looking at...it's a more holistic story... a whole bunch of microdecisions."
— Max Spiro [10:33]
On unreliable earlier AI detectors:
"Any text that is memorized by the AI is going to be low perplexity... The other issue...is English language learners also write in simple language...which then gets flagged as AI... The problem with perplexity in general is it's not really a metric that can be improved upon."
— Max Spiro [13:07]
On the “Serpent in the Grove” controversy:
"It just reads total AI. It reads, you ask ChatGPT to write a literary prize winning essay, and this is what it would say, which is kind of vapid and has a bunch of empty metaphors and is fake, pretend, deep."
— Max Spiro [22:38]
On using AI detection as a teaching moment:
"The reason that somebody would use AI, it's like a symptom of a deeper problem..."
— Max Spiro [27:49]
On humanizers:
"There's this whole crop of tools on the Internet called 'humanizers'... run it through another AI program to hide that you ran it through AI in the first place... They're just kind of like some of the scum of the earth."
— Max Spiro [35:13, 35:25]
On Pangram’s mission:
"We are building this core technology, this core infrastructure for a future where we have these powerful generative AI models."
— Max Spiro [36:24]
On the meaning of writing:
"Writing being proof of thought is not going to disappear... the problem of using AI to kind of be this cognitive offloading tool... I think this is just going to be a problem in perpetuity."
— Max Spiro [38:09]
This episode provides a thorough inside look at the problem and progress of AI text detection—exploring why Pangram has gained rare trust, how its method differs from earlier flawed attempts, and the ongoing “arms race” with increasingly sophisticated generative AI. Max Spiro underscores the stakes and philosophy: AI writing, unless disclosed, undermines the proof-of-thought that defines genuine human work.