Seedance 2.5 in Python: 30-Second AI Video, One Pass

Seedance 2.5 Just Opened Its API. Here's How to Drive It From Python.

On August 7, 2026, ByteDance opened the public developer API for Seedance 2.5, and the AI video crowd hasn't stopped talking about it since. The headline feature is the one that actually changes how you write code: a single API call now returns up to 30 seconds of video with synchronized audio baked in — dialogue, ambient sound, and effects generated together in one pass, instead of stitching a silent clip to a separate audio track afterward.