A Very Big Video Reasoning Suite

We bet on a future that video reasoning is the next fundamental intelligence paradigm, after language reasoning, where spatiotemporal embodied world experiences could be more naturally captured.

Data Engines

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gravity_physics

GitHub

Knowledge out-of-domain testset

Prompt

A ball at height 19.5m with initial downward velocity 4.5 m/s falls under gravity 12.2 m/s² and bounces on ground with elasticity 0.80. Show the full trajectory with velocity arrows (direction and magnitude) updating throughout until the ball stops.

First Frame

Last Frame

Video

shape_scale_then_outline

GitHub

Abstraction in-domain testset

Prompt

Show the shape first changing size and then becoming outline-only. Both transformations should match the example pattern.

First Frame

Last Frame

Video

grid_shortest_path

GitHub

Spatiality in-domain testset

Prompt

The scene shows a 10x10 grid with a blue start square (containing a yellow circular agent) and a green end square. Starting from the blue start square, the agent can move to adjacent cells (up, down, left, right). The goal is to move the agent to the green end square along the shortest path.

First Frame

Last Frame

Video

combined_objects_spinning

GitHub

Transformation training set

Prompt

The scene shows 2 objects on the left side and dashed target outlines on the right side. The dashed target outlines remain completely stationary. For each object, first rotate it in place to match the orientation of its corresponding dashed target outline, then move it horizontally to the right so that it aligns exactly with and fits within its corresponding dashed target outline.

First Frame

Last Frame

Video

color_addition

GitHub

Perception in-domain testset

Prompt

Two colored circular balls start at separate positions. They move toward each other at equal speeds until fully overlapping and merging into one. The overlapping region and final merged ball show the additive color mixture of the two original colors.

First Frame