Wan 3.0 plan: nine 2 s drafts plus a 12 s 1080p final is $4.13 on Sume

Nine 2-second drafts at 480p cost 9 x 2 x $0.0625 = $1.125, shown as $1.13, and the 12-second 1080p final costs 12 x $0.25 = $3.00. The whole prompt-test-and-final plan on wan-3.0 is $4.125 through Sume. Wan is the only Sume video row that accepts a clip as short as 2 seconds, which is what makes a draft this cheap.

Plan line by line

The rates are Sume's per second: $0.0625 at 480p, $0.125 at 720p, $0.25 at 1080p. A draft only tells you about motion and composition, not about 1080p detail, so keep drafts at 480p.

What a 2-second draft can and cannot show

A 2-second draft shows the first move of the subject and the camera path. It does not show whether the action holds for 12 seconds. If the final fails, you pay another $3.00. A middle step helps: one 6-second draft at 480p costs 6 x $0.0625 = $0.375, shown as $0.38, and shows more of the arc.

Keep the prompt identical between draft and final. Sume rejects seed on every v1 model, so a rerun is not deterministic, and the final can differ from the draft. Fix what matters with a first frame instead.

• Wan 3.0 accepts 2 to 30 seconds and first and last frames.
• Aspect ratios include 9:16, 16:9, 1:1, 4:3 and 3:4.
• Failed jobs are refunded; completed drafts are billed.

Submitting the batch

Send each draft with its own Idempotency-Key so a network retry returns the original job. The key must be unique per distinct payload; reusing one with a changed body is a different request.

curl -X POST https://api.sume.com/v1/videos \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: draft-03" \
  -d '{"model": "wan-3.0", "prompt": "A drone pass over a salt flat at sunrise", "duration": 2, "resolution": "480p", "aspect_ratio": "16:9"}'

Adapting the plan

Change the numbers to your tolerance. Twelve drafts at 2 seconds cost 12 x 2 x $0.0625 = $1.50. Five 4-second drafts at 480p cost 5 x 4 x $0.0625 = $1.25 and show more motion. With the original nine drafts, a final at 720p instead of 1080p would be 12 x $0.125 = $1.50, which brings the whole plan to $1.125 + $1.50 = $2.625, shown as $2.63.

Pick the tier your viewers will see. Most social placements compress heavily, and 720p is often indistinguishable on a phone.