Can Anthropic's Fable model build a physics puzzle game in minutes?

Short answer: Emanuele Melis says Fable rebuilt a contraption puzzle game he remembered from childhood in minutes from a short description. Jordan Metzner says the impressive part is the accurate real-time physics on a first attempt.

Watch this answer from Episode 46

Watch this answer from Episode 46 (starts at 2:17) · Episode 46 notes and transcript

What was said on Built This Week

From Episode 46: We Tested Claude 4 Fable and Deployed Enterprise Agents Without a Single Data Migration, starting at 2:17.

Sam Nadler [2:17]: Very cool. So, I think we're gonna dive pretty deep into AI One in a few minutes. But in the meantime, I think you built us a little demo. If I'm not mistaken, you used Fable, which is pretty topical. Let's jump in.

Emanuele Melis [2:28]: Yes. You guys remember there was early in the nineties, this little game where you had to build contraptions to effectively solve a puzzle. So I was like, I can't find it anymore. I don't remember. I used to play as a kid. So when Fable came out, that was the first thing that I tried. I have to try this. Can you put this together for me? And in fact, it did. And it doesn't look quite like it, but the idea was that you had this page where you were presented with, puzzle that you have to solve and you would place things in there. And in this case, you have to bounce the ball till the basket's right. And I was so surprised when it literally took Fable a couple minutes to put this together. Right? And you could play it and you could work it and it will just effectively, you put in the your funnier, you have the ball bounce and put the trampoline in and if you're lucky, it gets all the way up to your little basket. Well, maybe after a few tries, you will.

Emanuele Melis [3:31]: Yeah. Yeah. Almost. That's it. This way. Almost.

Sam Nadler [3:38]: But you guys remember this. Yeah. I remember this too. Right?

Emanuele Melis [3:42]: Yeah. Yeah. Yeah. So fun. I used to play all the time as a kid. But now yeah. There you go. It works.

Sam Nadler [3:47]: It works. That's awesome.

Emanuele Melis [3:49]: What's crazy to think about it is that a year ago, this would not have been possible, but today with Fable, literally took five minutes to put this together. I just told it, hey. I had this game as a kid. I don't remember the name but I loved it. Can you put it together for me on like in a web UI? And ten minutes later, boom. I was wasting my time in the office playing this.

Jordan Metzner [4:10]: Yeah. I think what this is what makes this so cool is not just that it's a simple puzzle game, is that the physics are very accurate to how the game expects to play. So that's a trampoline and the ball bounces expectingly like a trampoline or flat to the wood or the wind, etcetera. And so, I think those are always impressive when you see a model be able to implement, real time physics essentially, especially in a first go. So and obviously, yeah, this looks super fun. I'm sure you could theme it to a bunch of different ideas or whatnot, but make different levels, turn into a mobile game. Anyway, that's your new mobile career. Oh, there you go.

Emanuele Melis [4:45]: Great idea.

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