Can you tell which images are AI-generated?

hckr78 72 points 63 comments September 19, 2026
slop-sense.labtoagi.com · View on Hacker News

Discussion Highlights (20 comments)

spottedmarley

My method is simple: Did I create the image myself? Yes: Not AI No: AI

SmasherEpilepti

> 60 seconds to find out. > 90s round, 10s per image > Play 60 seconds This is confusing. What does "90s round" mean if it's a 60 second game? Is it about the 1990s?

orr94

My most effective strategy is to ask: is there any reason for a human to take this picture? One AI-generated image was a bedside night stand, with no clutter other than a set of keys on top of a receipt. It looked perfectly real, no glitches or weirdness... other than the idea of someone taking a picture of it. Not a perfect strategy, though; I thought this one was AI for just that reason: https://commons.wikimedia.org/wiki/File:Potted_plant_1_2018-...

parsimo2010

Not bad. I’d appreciate a much longer time limit. Got really rushed at the end. But this was crazy hard on my phone, I was straight guessing most of the time. I think I could be a little better with more time on a desktop screen. Another idea would be games that were all pictures of a single category- like 10 AI and 10 real pictures of basketballs, or food on plates, etc.

variety8675

I realized this is only somewhat difficult because of the 10s timer. Most people probably don’t spend more than 10s looking at a picture on social media, excellent project.

ori_b

We get it. AI slop is getting good enough to replace photography. This isn't good for humans, and makes the world a worse place. The fact that the suck machine works isn't something to be proud of.

uncomputation

Hmm… training data siphon?

VCFundedGenYer

Impossible to do on a phone. Zooming in is misinterpreted as a choice. Fix the game. Also the time limit is stupid and pointless.

Retr0id

The time limit did make it quite challenging. I got 1,000 points with a max streak of 8 in a row. On second playthrough I got 3,550 / 12. It seems the AI images all come from a particular area of latent space that's quite easy to recognize once you get dialled in. So it's more of a "can you detect the GPT Image 2.5 house style", which is an easier problem. I'd appreciate an untimed mode.

RomanKornev

Now add Geoguesser-like battle royale mode with accuracy points for guessing which model generated the image

Jowsey

I hadn't been exposed to the new GPT-Image-2.5 model before this, so didn't have any "tells" to go off of, and found it almost impossible to begin with, but it seems the brain is pretty good at adapting for visual stuff! After 2 rounds, I was able to build up a 16-image combo, answering most within a second or two. I think the "tell" I ended up with is that almost all of the AI images tend to center around a very obvious main "subject" (a flower, a bike, a wrench, etc) – presumably an inherent artefact of generating from a prompt – with everything else around the subject having a very strange depth to it. The depth, focus, and bokeh around the main subject just never look quite right. If you look at an image and find it has a very strong central subject with a little too much depth separation than expected, there's a good chance it's AI. I recognise that this method of finding a consistent "tell" will probably not hold for future models, unfortunately. Everything else looks almost perfect at this point.

sean2d

It would be cool if they published stats on how well people do on average, and how that changes over time and with different models. I feel like in a few years we'll either all be much better at this or completely desensitized, and sadly I'm guessing we're trending towards the latter.

karim79

Neat app but it makes me sad. Also I'm very curious as to where the real photos come from and how we can verify that they are indeed real. The timer thing doesn't really add any value, just stress.

al_borland

12/17. Due to the speed, I felt like I was just randomly guessing, but 70% correct seems better than random guessing. I did suspect some things. How mundane the AI images were felt like a means to trick people. It doesn’t seem like most people making AI images and posting them are generating still life images of everyday life. What would be the point?

shmoil

TIME'S UP 2,050 points Best streak: 9 in a row Hard af.

randiantech

best strategy: just click as fast as possible.

1ow

Got 4k by just spamming 2.

CapsAdmin

My biggest clue is the odd repeating details. Especially on grass, tree leaves, pores, etc Not all image models (or sampler settings) do this, but with gpt it's very obvious. With this in mind, I misjudged 3 images on the default game.

totetsu

I guess the UI is ai generated, and it impossibly to see the images well enough to judge on a phone.

cwnyth

I got 14/16 correct, and the two I got wrong had no people and I was unsure about both. Should have went with my gut.

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