Seedance 2.5 Video Extension fixes the upstream full‑modal reference subtask to video extension: input the source video and specify the continuation direction (forward or backward); outputs 4‑30 seconds with the frame size fixed as adaptive.
Pricing: Resolution 480p · No reference video: $0.098/sec; Resolution 480p · With reference video: $0.0588/sec; Resolution 720p · No reference video: $0.2205/sec; Resolution 720p · With reference video: $0.1323/sec; Resolution 1080p · No reference video: $0.54194/sec; Resolution 1080p · With reference video: $0.325164/sec.
