Runway gen4.5 API: 12 credits a second, a 10 s clip costs $1.20

A 10 second Runway gen4.5 clip costs 120 credits, which is $1.20, because Runway's API pricing guide lists gen4.5 at 12 credits per second and sells credits at $0.01 each. gen4.5 is not a model id you can call on Sume; the nearest 10 second clips on the Sume catalog cost between $1.00 and $1.25 at 720p-class settings.

Runway's same page lists gen4_turbo at 5 credits per second ($0.05), veo3.1 with audio at 40 ($0.40), veo3.1_fast at 15 ($0.15), aleph2 at 28 ($0.28), seedance2 at 1080p at 40 ($0.40), wan3 at 1080p at 20 ($0.20) and act_two at 5 ($0.05). It states its USD column is based on $0.01 per credit.

10 seconds across Runway and Sume

Sume figures are the provider list times 1.25, taken from Sume's pricing estimator for the stated resolution. None of the Runway models in the first block exist as Sume ids.

Reading the comparison

gen4_turbo at $0.50 for 10 seconds is the cheapest line on this table, and Sume has nothing priced below $1.00 at 10 seconds in the 720p class. If your brief is a quick motion test, that is a real point for Runway; Sume's cheaper entries are 480p drafts, for example wan-3.0 at 480p, 10 x $0.0625 = $0.625.

Where the comparison is not like for like: Runway's page does not state resolution or audio for gen4.5 in the part of the page read, while the Sume rows are fixed at the stated resolution, and gemini-omni-flash-1.1 always includes native synced audio per the Video Router docs. Check the clip you actually need before reading anything into a dollar gap.

Budgeting the switch

Runway credits are bought as a block at $0.01 each, while Sume draws on a workspace USD balance and reserves each job on submit. For a 20 clip test at 10 seconds, gen4.5 is 20 x $1.20 = $24.00, and 20 x $1.00 = $20.00 on minimax-h3-max at 768p.

The Sume ids and their limits are listed by GET /v1/video-router/models; video generation covers the same catalog through POST /v1/videos.