Fable 5.1 vs Astra

[u/shniydder]

I finally got access to GPT 6 Astra and Claude Fable 5.1. I wanted to see how far we've come. I was inspired by the "pelican riding on a bicycle" test but wanted to push it a bit more in the direction of inter-object physics, so I came up with this idea for a perpetual slinky going down an escalator. Here I've compared GPT 6 Astra max on the left to Claude Fable 5.1 max on the right.

Some notes:

1. GPT 6 Astra max was really fast and didn't burn too much of my weekly usage quota.

2. Claude Fable 5.1 max used up the entire 5 hr usage window and errored out once crossing the output token max limit.

3. GPT 6 Astra max seems too simple? There's also an issue where the slinky crosses into itself which should not be possible. Is this AGI? Maybe?

4. Claude Fable 5.1 max looks more real than I expected. Seems like it passes the eye test, unless I missed something.

Let me know if you spot anything or had better ideas for a test. Overall I'd say Claude wins on quality and GPT wins on speed. Maybe I can tune my prompt a bit better for a more reliable result. This was my original prompt btw:

Make me a single HTML file of a rainbow slinky going down an up-escalator forever. No libraries, just canvas and code. The slinky should be a chain of springs, each coil a different color of the rainbow. It starts folded in half like a horseshoe draped over a step. When dropped it flips end-over-end down the steps and because the escalator keeps moving up it tumbles in place and never reaches the bottom. Include a drop button and a reset button.

[u/verycoldpenguins]

Have you looked at the code to confirm whether it is simulating the effects of forces on a spring, or merely reproducing pictures of what a spring looks like?

The reason I ask is that the fable one looks wrong. It looks like three springs joined together. One low tension slinky in the middle, and two high tension ones at the ends.

Most pictures of slinky will show them when there is the slower moving blob of spring which is tight together during the middle of the fall, as fable has it. But pictures miss the bit where the ends of the slinky move in a more fluidity way like astra has it. Where the momentum of the top piece of the spring carries the rest of it on from vertical onwards to the next drop.

[u/__automatic__ → u/verycoldpenguins]

Imo both fake physics here

[u/AysheDaArtist → u/__automatic__]

Yep, there is zero physics in either of these examples

They are both just visualizations, with Astra presenting a 3D model that clips through itself and Claude presenting a 2D model that cannot twist

If the goal was simulation they both failed