Cheapest possible clip per Sume video model: the minimum-length floor

Per-second rates make minimax-h3 and wan-3.0 look identical at 480p ($0.0625), but each model has a minimum duration, and that sets the cheapest clip you can buy. On Sume, gemini-omni-flash-1.1 at 360p for 3 seconds costs $0.1125, wan-3.0 at 480p for 2 seconds costs $0.125, minimax-h3 for 5 seconds costs $0.3125, seedance-2 for 4 seconds costs $0.70308 and seedance-2.5 for 4 seconds costs $1.074708.

The floor table

Each row is the lowest listed resolution at the shortest valid duration.

Why this matters for tests

If you only want to confirm that a prompt works, the minimum clip is what you pay for a smoke test. Smoke-testing seedance-2.5 costs about 9.6 times what an Omni smoke test costs ($1.0747 / $0.1125). Seedance 2.5 also bills a minimum of 4 seconds, so a 1-second request is not possible.

The floor is not the quality floor: 360p and 480p are preview-size frames.

Using it

Use the floor for integration tests of the job lifecycle, where the pixels do not matter. Use the full rate for finals. The list of valid durations per model comes from GET /v1/videos/models, described in the Video generation docs. One more rule: billing is linear in seconds inside each model's valid range, so a 6-second wan-3.0 clip at 480p is 6 x $0.0625 = $0.375.