Runway Gen-4 Turbo at 5 credits a second vs Sume drafts, then a final

Runway's API charges $0.01 per credit, and Gen-4 Turbo costs 5 credits per second, so $0.05 per second, against 12 credits ($0.12) for Gen-4.5. On Sume, the lowest-priced draft row I compared is gemini-omni-flash-1.1 at 360p, $0.0375 per second. wan-3.0 and minimax-h3-max at 480p are both $0.0625 per second, which is above Runway's Turbo rate.

Draft rates compared

Runway figures are from the Runway API pricing guide. Sume rates are the fal list rate times 1.25.

How the rates are built

The arithmetic: Sume's Omni 360p list is $0.03, and $0.03 x 1.25 = $0.0375. Wan 3.0 480p is $0.05 x 1.25 = $0.0625. H3 Max 480p is $0.05 x 1.25 = $0.0625. Runway's Turbo is 5 x $0.01 = $0.05.

Draft then final on Sume

A draft pass is only worth it if the final differs in resolution and the draft shows you composition, motion and timing. Say you test with an 8 second Omni clip at 360p, then render the keeper at 1080p. The test is 8 x $0.0375 = $0.30. The final is 8 x $0.1875 = $1.50. Total $1.80 for one kept clip and one test. Three tests and one final is 3 x $0.30 + $1.50 = $2.40.

A model can change a result when you change its resolution, so look at the draft for framing and pacing and not fine detail. I make no claim about how closely a 360p draft predicts a 1080p result.

Which to pick

Runway's Turbo rate is lower than the Sume Wan 3.0 and H3 Max 480p rows and higher than Omni 360p. If a 5 cent Runway second fits your workflow, that is a fair reason to use it. Sume's draw is one API and one balance for many models, not a lower Turbo-equivalent price. Compare on the whole route, including the clip lengths each one accepts.