What is Seedance 2.0 Fast best used for — when should I choose it over Pro?

Seedance 2.0 Fast is best for draft exploration, concept validation, and rapid iteration. (The full model is just called Seedance 2.0 — there is no 'Pro'.) When you're testing multiple video concepts to find the best creative direction before committing to a final render, Fast lets you do this from 30 credits/second instead of 45 (480p). Once you've identified the strongest concept or prompt, switch to Seedance 2.0 for the final high-quality output, at up to 1080p or 4K. Many creators use Fast for 3–5 test renders before producing the final video.