Show HN: Jev Cards, Can you beat a vision model at a picture quiz?

Posted by totisjosema 2 days ago

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I built a quiz game around TypeSafe's new Jev model, which has vision capabilities. Jev looks at a picture and a question and picks an answer (or taps a place) in about a quarter of a second.

I've always loved quiz games and thought this would be a fun way to see what it can do and how fast it is. I made the cards from scratch, and Jev gets exactly the picture you see. More cards will come over time.

Play against Jev on your own (there's a leaderboard for each mode), or start a live match and challenge your friends, with Jev as one more player.

The code is open source, so feel free to build your own game or make more cards that I can publish.

Play: https://jevcards.com Code: https://github.com/Jose-Sabater/jevcards (the newest cards stay private for a while)

Disclaimer: I ran Jev through both TypeSafe and Opper, and made the cards through Opper's vision models and Claude Code. I work at Opper, but jevcards is open source and free to play.

Comments

Comment by joshstrange 1 day ago

I beat Jev and only failed on the dart board, I have zero idea how to read a dart board.

Comment by totisjosema 1 day ago

Well, good that you beat Jev anyway , not many do :)

Comment by cpuhalladmin 5 hours ago

Fun! Made me realise i need to brush up on geography. Site is quite smooth games are fun.

Comment by totisjosema 1 hour ago

Thanks!

Comment by totisjosema 22 hours ago

A quick update, I took some QoL feedback received in comments and also added 300 new cards so play stays interesting.

Also Ben... Whomever you are I know you cheated, and... will allow it for now ;)

Comment by nickabe 1 day ago

You might want to adjust the scoring.

A simple system would be something like: - accuracy is most important - if tied on accuracy (ie both got 8/10) then tie break is done on speed

In general, across a lot of games - winning is a big determinant in who comes back. Right now it might be very difficult to beat JEV with the way your scoring is setup.

For my game in particular it's like a 47% chance that a winning player returns versus just 10% for non-winners.

Comment by totisjosema 1 day ago

Each game mode tests different things. Sprint is all about speed, it will be hard to beat JEV if he doesnt fail but one failure adds 15s. So you have a chance (in fact JEV gets around 80% right)

Versus Measures accuracy but under time pressure, if you score more than Jev you will win.

And streak is also accuracy.

This quiz game, is supposed to visualize how good and bad these type of models are. They can be very fast but they can also fail 20% of the times. As a human, can you beat that?

Comment by nextaccountic 1 day ago

Could you add an option to remove musical theory questions? I mean, I know Jev can ace those as well, but I can only click at random, that's unfun

Comment by ajjenkins 1 day ago

In my opinion the the point of the site is that Jev has knowledge on all topics that makes it hard to beat. It might not be as smart as you, but it probably has a greater breadth of knowledge.

Comment by nextaccountic 1 day ago

Yeah but this is also a fun, addictive game and I was invested into beating Jev, but every run where musical theory appeared had to be aborted

Comment by totisjosema 1 day ago

just play again :), but will consider adding whitelist/blacklist of categories

Comment by folmar 1 day ago

also less USification would help, it's not common knowledge how US birds or bridges or hats look like

Comment by totisjosema 1 day ago

will add more cards, thanks for the feedback

Comment by hluska 1 day ago

Considering this whole thing is AI slop, you could be a lot more polite when people make feature requests.

Comment by totisjosema 1 day ago

sorry you saw it that way, was just kidding, there are many categories unlucky of him that the one he doesnt like landed on his deck Anyway the feature he requested was literally on the app 5 minutes after he asked :)

Comment by ajjenkins 1 day ago

This is fun, and a good demonstration of Jev’s capabilities.

It’s obviously much faster than a human, but it’s interesting that it only got 7/10 right on both rounds (same as me). I’m wondering what Jev could be trusted to do reliably given these results.

I guess it wasn’t optimized for these types of trivia questions. Or maybe the image capabilities are too new and need refinement.

Comment by totisjosema 1 day ago

Thanks for the feedback, and you got the purpose of this little app exactly right. Each game mode tests different things. And it shows the strengths and weaknesses of this model. In streak almost all humans will win, but in sprint very few, however, very good humans will still beat the machine.

Jev and decision models, can make decisions very fast, in this quiz with around 80% accuracy, each use case will need to define if its good enough or not.

Comment by jrflo 1 day ago

Very cool demo! Although I feel that incorrect answers should be penalized more. For instance- I got 100% in about 45 seconds on the sprint. Then, I clicked through as fast as I can (only limited by finding the right targets) and got a score of 42s, technically better than my first score but I only got 20% right.

Comment by totisjosema 1 day ago

Thanks for the feedback! And now that you showed everyone a cheat sheet we will get many high scores, so lets increase the penalty of wrong answers and reset the leaderboard! Thanks a lot for the insights

Comment by arjie 1 day ago

Would prefer if the audio button was at the top right of the page etc.

Comment by totisjosema 1 day ago

Will take a look, should already be there during a game though

Comment by podnami 1 day ago

This was pure fun for 62s until I found out how lousy I am

Comment by totisjosema 1 day ago

Jev has been humbling many today (including me) Still fun to play tho, invite some games and play with them.

Comment by sara_kumodeck 1 day ago

Having the model as just one more players in a live match with friends is a fun way to show off tis speed

Comment by totisjosema 1 day ago

Yeah, the solo play is fun, but with friends its much better

Comment by geooff_ 1 day ago

I "Lost" to Jev while getting 10/10 questions and it got 8/10. Interesting scoring?

Comment by drivers99 1 day ago

I wonder if they fixed it, or if it depends on the game type. In Versus mode, I got 10/10, Jev got 7/10, but the points were closer: 1201 to 1034 so I assume time is also part of the calculation. One of mine was 9.6 seconds vs 0.3 seconds. It wasn't always clear where you were supposed to click, like on a graph, the choices were buttons at the bottom of the screen.

Comment by totisjosema 1 day ago

Its a combination of time and correct/wrong answer. But the game had not been played by these many people before so it can be that the scoring mechanism is not fully calibrated. Thanks for trying it out!

Comment by TZubiri 1 day ago

Too late, we've already replaced online image and video moderation with Jev, get with the times.

Comment by 1 day ago

Comment by AuthAuth 1 day ago

I went in thinking I was going to cook Jev and then I get asked things like "pick the ginko leaf". Good site

Comment by totisjosema 1 day ago

haha, wait until you get asked which is a dolphin

Comment by darepublic 1 day ago

Tbf jev should also be required to use vision on the UI to decide where to click to proceed with the quiz

Comment by darepublic 1 day ago

Nice site. I assume vibecoded but it was tasteful and performant on mobile. Thanks for open sourcing it

Comment by totisjosema 1 day ago

Thanks! Yeah built with claude code.

Comment by inerte 1 day ago

I got a lot of answers wrong (half of them maybe?), and the ones I got it right Jev was still faster.

Comment by totisjosema 1 day ago

Play some more you will get the hang of it :) The first 200 cards I did: Jev got 160 right, at a median of 261 ms , so no need to feel bad

Comment by edaemon 1 day ago

Interesting. Jev is certainly faster but it was wrong quite a bit more than I was.

Comment by totisjosema 1 day ago

yeah the different games play to different strengths, you can play multiplayer with friends also

Comment by arm32 1 day ago

Just like a coin flip!

Comment by totisjosema 1 day ago

A coin flip with 80% chance of success tho (and 100% in some categories)

Comment by felix089 1 day ago

I beat Jev, but jeez the leaderboard is pretty competitive...

Comment by totisjosema 1 day ago

Good job, there are some insane scores, you already better than the majority of us

Comment by TZubiri 1 day ago

Couple of bugs:

1- I got 7/10, jev got 6/10, and it says Jev won, presumably because I took 100 seconds, but Jev took 60? Funny what that reveals about author and AI-optimism in general

2- The chess board challenge isn't clear on how it should take the answer, I tried dragging a piece but that didn't work, then I tried touching the piece I wanted to move, but it marked the answer wrong, I apparently had to touch the square I needed to move the piece to.

Comment by totisjosema 1 day ago

Jev did not take 60 seconds for sure, with answers in 200-300 ms averages, more like 2 seconds.

You get very high scores if you are fast and accurate (which Jev is most of the time), and you get punished hard (15s) if you are wrong. The game balances speed and accuracy.

Will try to improve the cards that didnt work for you, thanks for the feedback!

Comment by TZubiri 1 day ago

It's technically subjective, but to me speed is a tiebreaker, it goes after the decimal point. Being right is more important than being fast.

There's notably no button for "I don't know", but if there were, a human would maybe get 7 rights and 3 I don't know. While Jev would probably get 6 rights and 4 wrongs. I get that it's a game, but it's also not.

I think great minds make great efforts to not be wrong, someone that is never wrong is in a different category completely than something that answers fast, or even that answers more correct questions.

Comment by ajjenkins 1 day ago

I was confused by the chess board question too. But I do think the question is worded correctly—it’s just a little unintuitive.

Comment by semiquaver 1 day ago

The first one I opened only gave me a single option to press and when I pressed it the app told me I was wrong and that Jev had pressed the correct button (which was invisible to me I guess?)

I saw several other questions where I pressed the right answer and the app scored me as wrong. Broken slop.

Comment by coolThingsFirst 1 day ago

Wait a minute Orca is a Dolphin?

Damn.

Comment by totisjosema 1 day ago

I failed that one as well, learn something new every day I guess

Comment by logicallee 1 day ago

This was very fun! I enjoyed playing it. Thanks for sharing.

Comment by totisjosema 1 day ago

Thanks for trying it out!

Comment by casey2 1 day ago

I thought I did terrible 5, but jev got 0 in a row. then the slopcoded app says "Jev has won 2,613 of 3,300 games, this one included."

Though if you need very quick answers obviously humans can't compete.

Actually on further thought after getting 15, if you've seen the exact problem before you can answer quickly, so the usefulness is diminished to problems that don't need to be 100% correct, need to be solved very quickly (even routing might not need to be this quick), problem form often changes, but is still general knowledge, and very low marginal benifet for 99% correctness over 50%

Comment by totisjosema 1 day ago

Jev gets around 70-80% right. Varies a lot per category. But its quite surprising that its soo good in some of them