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. When you're testing multiple video concepts to find the best creative direction before committing to a final render, Fast lets you do this at 25 credits/second instead of 30. Once you've identified the strongest concept or prompt, switch to Seedance 2.0 Pro for the final high-quality output. Many creators use Fast for 3–5 test renders before producing the final video in Pro.