Seedance 2.5: 30-Second AI Video From One Photo
Most image-to-video models stop at 5–10 seconds, which forces creators to stitch clips together — visible seams, drifting faces, mismatched sound. Seedance 2.5, ByteDance's long-form entry in the Dreamina family, fixes that at the source: it animates a single still into one native 30-second clip with synchronized audio. Here's what it does, what it costs, how the budget tier (Seedance Mini) fits in, and how to try both free.
What Seedance 2.5 does
- 4–30 second single-pass clips — the longest of any model on our lineup (Vidu Q4: 16s, Kling: 10s, Veo: 8s)
- Synchronized native audio — dialogue and effects locked to motion, no extra charge
- 480p / 720p / 1080p on the same model
- Coherent long takes — characters, lighting and sound stay consistent because it's one generation, not glued clips
Seedance API pricing (and what it costs here)
| Model | API cost | On img2.video | Audio |
|---|---|---|---|
| Seedance 2.5 | $0.22/s 480p · $0.47/s 720p | 65cr / 5s · 365cr / 30s 480p | Included |
| Seedance 2.0 Mini | $0.072/s 480p · $0.155/s 720p | 20cr / 5s 480p · 90cr / 10s 720p | Included |
Yes, 2.5 is a premium tier — you're paying for the 30-second capability. That's exactly why Seedance Mini exists as the everyday option: 20 credits with audio, the cheapest full-featured clip on the site.
How to use Seedance (free start)
- Open the Seedance 2.5 generator (or Mini for budget drafts).
- Upload one clear photo — the subject large in frame.
- Write a scene prompt with a beginning and an end: "she notices the letter, reads it, and slowly smiles as the light shifts to golden hour". Long clips reward multi-beat directions.
- Pick duration (5 / 10 / 30), enable audio, generate, download the clean MP4.
Pro tip: draft the prompt on Mini at 5s/480p (20 credits), then render the winner at 30 seconds on 2.5. Same family, so the motion style carries over.
FAQ
What is Seedance 2.5?
ByteDance’s long-form image-to-video model (Dreamina family). Its signature: one still becomes a native 30-second clip — continuous motion with synchronized audio, no stitching of shorter clips.
How much does the Seedance API cost?
On fal’s API, Seedance 2.5 runs about $0.22/s at 480p and $0.47/s at 720p (token-based billing). On img2.video that translates to credits: 65 credits for 5s/480p, 365 for a full 30s/480p, 785 for 30s/720p — audio included.
What is Seedance Mini?
Seedance 2.0 Mini is the fast budget tier of the same family: 480p at roughly $0.072/s, 720p at $0.155/s, audio included. On img2.video that’s 20 credits for a 5-second 480p clip with sound — the cheapest full-featured video here.
Seedance vs Kling 2.6 — which is better?
Kling 2.6 still wins on cinematic motion per credit ($0.07/s at 720p). Seedance 2.5 wins on length (30s native vs 10s) and free audio; Seedance Mini matches Kling’s price with audio included. Pick by job: long story → Seedance 2.5, cheap daily clips → Mini, cinematic 5–10s → Kling.
Can I try Seedance for free?
Yes — img2.video gives every new account 30 free credits, which covers a full Seedance Mini clip (20 credits) with audio. No card required.
Sources: Seedance 2.5 API & pricing (fal.ai) · Seedance 2.0 Mini API (fal.ai). Last reviewed October 2026.