Three-body problem in Bend2
Author’s claim. Posted before Fable 5.2 came out. The author called it Fable 5.5, the name rumors gave the next Fable. We can’t verify which model ran.
A real-time simulation of the three-body problem written in Bend2. The author says it is about 1,000 lines, runs at 60 fps on an M5 Mac, and has four program properties formally proven.
One email a week: the best new Fable 5.2 works
Picked from what creators posted that week, each one credited and linked to the original post.
One email a week: the best new Fable 5.2 works
Our note
A dark window titled "3 Corpos" tours ten numbered three-body setups labelled in Portuguese, from "1/10 Figura-8", credited to Moore and Chenciner-Montgomery, through "Borboleta I", "Yin-Yang I", "Novelo", a Lagrange triangle going "da ordem ao caos" (from order to chaos) and Burrau's 3-4-5 problem, to "10/10 Caos: tres massas ao acaso", three random masses. Pink, blue and gold bodies leave coloured trails over faint contour rings. The title bar shows "60 FPS", a time value, a speed multiplier and an energy-drift figure, mostly 0 to 7 ppm, though one chaos frame reads 8049 ppm. Bend2, the line count and the proofs are the author's claims; no prompt was shared.
Written by The Frontier Brief after watching the video (Nov 5, 2026). It describes what is on screen; we have not run the work ourselves.
Prompt
Not known. We have not found a prompt published by the author.
What we know
- Model
- Listed under Fable 5.2. The author wrote Claude Fable 5.5 (author’s claim)
- What we checked
- From the open awesome-fable5-5-videos list (MIT, Copyright (c) 2026 yihui-dev). On Oct 31, 2026 the post was still live on X; which model actually ran is the author’s claim.
Video from @zAdrielsan’s post on X, credited to the author. Want it taken down? Email support@fable5.app.
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