The expensive mistake in AI video usually happens before rendering: the scene itself was wrong.

A better model doesn't fix a bad camera path or broken spatial layout.

GPT-6 Astra is now live on OnSolo, and the Whitebox Video Expert makes the most sense to me.

I can describe a scene, Astra reasons through the space and motion, and the system gives me a whitebox pass before the final render.

So I can validate blocking, object placement, and camera movement while everything is still cheap to change.