Today we introduce Animation Bench, a benchmark for how well frontier multimodal coding agents can recreate real web animations.
We gave frontier models 48 animations from 32 production websites, covering things like scroll, hover, drag, click, cursor movement and state changes.
We show that while frontier models are getting pretty good at recreating what a website looks like (the layout), there is still room for improvement in recreating how it moves.
Across 192 reconstructions, visual similarity was better than motion consistency in 177 of them. The median reconstruction captured only 63% of the reference motion. 38% captured less than half.
Introducing Animation Bench, our first benchmark to evaluate frontier models on web animation reconstruction.
Coding agents can already recreate visually plausible web animations, this work evaluates if they can reconstruct behavior of a web page.