ByteDance announced Seedance 2.5 with generation up to 30 seconds, multimodal references, editing, and multi-round extension. Longer clips can reduce assembly work, but a failed late beat can make a single run expensive.
Test a timed sequence and record usable seconds, extension failures, audio repairs, and review time. Confirm current platform pricing and limits before production.
Evaluation card
Run one controlled test.
- Keep the brief and source assets identical.
- Record retries, credits, and human review time.
- Inspect product truth and temporal consistency.
- Confirm commercial terms before publishing.