Seedance 2 5 Api Access Guide Features Code Examples For Long Form Video

Krea's guide to the Seedance 2.5 API shows that ByteDance Seed's long-form video model is called as a background job: a request returns a job identifier, and the application retrieves the finished video later or receives a completion notification. That matters because generation can take minutes.

In its August 2026 tests, Krea reports that one 30-second, 1080p clip with audio took 10 minutes 17 seconds from submission to a downloadable result. This is one measured run, not a promised turnaround. Krea's recommendation is to have the service notify the application with a webhook rather than hold a request open, and to check the returned job identifier against jobs the application started because those notifications are unsigned.