Seedance 2.5 Adds 1080p on the Runway API

Seedance 2.5 gained 1080p output on Runway's API on August 15, 2026. The seedance2_5 model now supports text-to-video, image-to-video, and video-to-video at 1920×1080 or 1080×1920. Output costs 68 credits per second, with an 80-credit minimum; native 4K remains on Seedance 2.0. 1

The practical call: switch if you publish 1080p landscape or portrait masters and have been upscaling softer output. Stay on your current workflow if 720p is enough or the credit budget matters more. ByteDance launched Seedance 2.5 on July 31 with an emphasis on longer storytelling, multimodal references, and editing control. 2