24 Wan 3.0 boards at 480p, then 6 finals on Seedance 2 at 1080p

A cheap model can storyboard and a better one can finish. Twenty-four 6-second storyboard shots on Wan 3.0 at 480p cost $9.00 ($0.375 each), and finishing six chosen shots on Seedance 2 at 1080p, 9:16, adds $30.618 ($5.103 each): $39.618 in total.

Drafting the same 24 shots on Seedance 2 at 480p instead would cost $25.3109 for the board alone, so the Wan board saves $16.3109 before the finals.

The two plans

Plan A uses Wan 3.0 for the board. Plan B uses Seedance 2 for both stages. Seedance rows are 9:16.

What the Wan board does and does not prove

It proves staging, framing, the subject and the pacing of the cut. It does not prove how Seedance 2 will render that prompt: the two models read prompts differently and you cannot carry a seed across them (no v1 model takes a seed). Treat the board as a shot list with moving pictures.

A practical rule is to keep prompts structural on the board (who, where, camera) and add the model-specific style language only in the final prompt. Expect to re-roll some finals, and budget one retry per three finals: that is $10.206 for two extra.

Run the board

Use one request template and an idempotency key per shot, so a rerun of the loop never double-submits.

import os, requests

H = {"Authorization": f"Bearer {os.environ['SUME_API_KEY']}"}
shots = ["Wide: empty cafe at dawn", "Close: espresso pour", "Pan: barista smiles"]

for i, s in enumerate(shots, 1):
    body = {"model": "wan-3.0", "prompt": s, "resolution": "480p", "duration": 6}
    r = requests.post("https://api.sume.com/v1/videos", json=body, timeout=60,
                      headers={**H, "Idempotency-Key": f"board-shot-{i:02d}"})
    print(i, r.status_code)

Gotchas

• A shot that works on Wan may need a different prompt on Seedance 2, so keep the final's prompt separate.
• Seedance 2 accepts up to 15 seconds; Wan 3.0 accepts 2 to 30. Keep board and final lengths equal.
• A job that fails before capture is released back to your balance; a rejected board shot is spent.