Runway Gen-4.5 and Gen-4 Turbo list one rate: drafting on Sume at 480p

Runway's API pricing page, at $0.01 per credit, charges gen4.5 12 credits per second and gen4_turbo 5 credits per second, and shows both only in the 1080p column. That is $0.12 and $0.05 per second with no cheaper draft resolution listed for those two models. On Sume, a draft ladder exists at 480p on several models, for example Wan 3.0 at $0.0625 per second.

What Runway lists (read 2026-10-04)

The pricing page prints credits per second of output. Seedance 2.5 and Wan 3 have resolution columns on that page; Gen-4.5 and Gen-4 Turbo have only the 1080p one.

What a 480p draft costs on Sume

Sume bills the provider list times 1.25, rounded up to the cent per job. Wan 3.0 lists $0.05 per second at 480p, and MiniMax H3 Max lists $0.05 at 480p.

A draft on one model is not a preview of another

A 480p Wan clip tells you whether the motion, framing and prompt work. It does not show how a Runway model would render the same prompt. If your final render is on Runway, draft on Runway. If your final render is on Sume, draft on the same model at 480p, then re-submit at 1080p.

curl -X POST "https://api.sume.com/v1/videos" \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "wan-3.0",
    "prompt": "A barista pours latte art, macro shot",
    "duration": 10,
    "resolution": "480p",
    "aspect_ratio": "16:9"
  }'

Check the draft tier first

Run GET /v1/videos/models and read supported_resolutions and pricing_skus for the id you plan to use. Models that start at 480p or lower are the cheap places to test a prompt.