Best AI video model for motion and action?

The same prompt in 4 models, side by side and in sync, each one’s first take. Under each clip: what it costs in the cheapest app that needs no code. Cheapest first.

Prompt: “A golden retriever runs along the water's edge at sunset and splashes into a small wave. The camera tracks alongside at the dog's height. The sound of waves and splashing water.”
Length: 6 seconds
Quality: 720p, 16:9
Sound: On
Take: 1, no retries

The wall stays silent. Open a clip to watch it large, with sound.