11 Nov 2026 ·film ·Claude Fable 5.2 ·1 min 17 s

Open brief: show what you can do

One open sentence, and the model chose the subject, the look and the sound: ink in water, a strange attractor, the Mandelbulb, glass, an ocean.

The whole prompt
Make the best video that shows off what you can do. You choose the subject, the look and the sound.
How it was made
  • 76.8 seconds, with sound. Nothing is filmed: every frame and every note is computed by code written in that session, about 1,000 lines.
  • 43 min 33 s from reading the sentence to the first finished film.
  • The ink in water is a fluid simulation on 160 × 128 × 64 = 1.3 million cells. The glass is path traced at 256 rays a pixel, up to 9 bounces.
  • The sound is sines and noise from a numpy script. The frames took 13 min 44 s to draw on an Apple M5 graphics chip.
  • Afterwards: larger captions and a brighter mix, 19 min 38 s more.
What still fails
  • The fine grain turns soft whenever a platform compresses the video again.
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10 Nov 2026 ·film ·Claude Fable 5.2

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