/Tech4h ago

Fable 5 Delivers Superior Evolving Species Simulation Over GPT-5.5

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Original post
Jay Hack@mathemagic1an#1385inTech

Sharing personal evals for Fable 5

"life-sim": simulate an island with 3 populations of competing, evolving creatures.

Fable's solution is beautiful, ergonomic, and legitimately interesting to watch. It designed for longer time horizons than 4.8/5.5.

https://galaxybrain.dev/eval/life-sim

8:04 AM · Jun 10, 2026 · 2.1K Views
Sentiment

Positive users praise Fable 5 for delivering the first realistic fluid mechanics in simulations like a fishtank and useful personalized shopping outputs because it outperforms prior models in calibration and variety.

Pos
100.0%
Neg
0.0%
3 comments with sentiment.
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VIEWS349
Jay Hack@mathemagic1an

"sweats-dossier": make a personalized shopping guide for high-quality sweats

Built a beautiful lookbook. Found relatively niche brands that others did not, assembled more diverse options.

Best solution yet. Again.

https://galaxybrain.dev/eval/sweats-dossier

Jay Hack@mathemagic1an

"fishtank-water-sim": simulate a hovering fishtank as water pours in.

It's the first model to get even close.

Well-calibrated fluid mechanics for interesting effects. Looks like actual water.

https://galaxybrain.dev/eval/fishtank-water-sim

4hViews 349Likes 1Bookmarks 1
BOOKMARKS1LIKES2REPLIES1
Jay Hack@mathemagic1an

"fishtank-water-sim": simulate a hovering fishtank as water pours in.

It's the first model to get even close.

Well-calibrated fluid mechanics for interesting effects. Looks like actual water.

https://galaxybrain.dev/eval/fishtank-water-sim

Jay Hack@mathemagic1an

Sharing personal evals for Fable 5

"life-sim": simulate an island with 3 populations of competing, evolving creatures.

Fable's solution is beautiful, ergonomic, and legitimately interesting to watch. It designed for longer time horizons than 4.8/5.5.

https://galaxybrain.dev/eval/life-sim

4hViews 195Likes 2Bookmarks 1
Jay Hack@mathemagic1an

It's a good model, sir.

4hViews 83