Which AI video model gets physics right

A spill is a hard physics problem: liquid, ice, glass and a surface, all interacting. We gave 19 models the same tipping glass on a wooden table and watched what happened to the water. The grid includes the September 18 additions; each model page dates its own run.

Anvisha Pai

Anvisha Pai, Co-founder & CEO, Voyager

Verified

What the side-by-side shows

Veo 3.1 throws the most convincing spill, with droplets and a puddle that spreads. Veo 3.1 Lite, surprisingly, produced the biggest splash on the roster. Seedance 2.0, Wan 3.0, MiniMax H3 and Veo 3.1 Fast all get a believable spill. The failures are specific: Wan 2.7 grew the ice cubes to nearly the size of the glass; Seedance 2.5's water turned to a translucent haze; Hailuo 2.3's ice stayed inside a glass that never quite tipped; Kling Pro's glass ends up standing again.

  1. 1.Veo 3.1 droplets, a rolling glass and a puddle that spreads like water.
  2. 2.Veo 3.1 Lite the biggest splash in the set, from the cheapest Veo tier.
  3. 3.Seedance 2.0 a clean tip and spill with ice that slides.
  4. 4.Wan 3.0 a convincing spill with the cubes staying cube-sized.

Every video model on this prompt, 19 clips

One try each, nothing re-rolled or retouched, generated by us. Ranked models come first; the rest follow in family order. Open a model for the rest of its set.

›The prompt every model got

A glass of water tips over on a wooden table and spills in slow motion, water and three ice cubes sliding across the wood, macro lens, morning light.

A spill in slow motion: does water behave like water.

1Veo 3.177s · $2.40

droplets, a rolling glass and a puddle that spreads like water.

2Veo 3.1 Lite60s · $0.30

the biggest splash in the set, from the cheapest Veo tier.

3Seedance 2.0132s · $1.51

a clean tip and spill with ice that slides.

4Wan 3.0178s · $0.50

a convincing spill with the cubes staying cube-sized.

Gemini Omni Flash45s · $0.65
H3 Max Turbo6s · $0.10
H3 Max6s · $0.20
MiniMax H362s · $0.30
Hailuo 2.3197s · $0.28
Kling 3.0 Standard507s · $0.63
Kling 3.0 Pro665s · $0.84
LTX 2.373s · $0.48
Luma Ray 3.287s · $1.00
PixVerse V660s · $0.30
Seedance 2.5231s · $2.31
Sora 287s · $0.40
Veo 3.1 Fast80s · $0.90
Wan 2.7108s · $0.50

The other prompts

Frequently asked questions

Which AI video generator has the most realistic physics?

On a slow-motion spill, Veo 3.1 and, unexpectedly, Veo 3.1 Lite produced the most water-like water. Seedance 2.0, Wan 3.0 and MiniMax H3 were convincing too. Wan 2.7 and Seedance 2.5 both broke in different ways.

Anvisha Pai

Anvisha Pai

Co-founder & CEO, Voyager

Anvisha is the CEO of Voyager and a repeat, Y Combinator-backed startup founder. She was previously a PM at Dropbox. She believes nobody should need a design degree to make something that looks great.

Voyager

Run any of these inside Voyager

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