$50 batch of 10-second 9:16 clips: 8 to 40 at 720p, by model

The short answer

A $50.00 budget buys between 8 and 40 ten-second 9:16 clips at 720p on Sume. The low end is Seedance 2.5 at $5.78 per clip; the high end is Wan 3.0 and Gemini Omni Flash 1.1 at $1.25 per clip. Every price is billable: provider list x 1.25, rounded up to the cent.

Clips per $50, by model

Count = floor(5,000 cents / clip price). The last column is the unspent change.

Arithmetic for two rows

Wan 3.0 at 720p lists $0.10 per second: $0.10 x 10 s = $1.00; x 1.25 = $1.25 a clip; $50 / $1.25 = 40 clips, nothing left. Kling 3 without audio lists $0.112 per second: $0.112 x 10 = $1.12; x 1.25 = $1.40; $50 / $1.40 = 35.7, so 35 clips and $1.00 left over. With audio on, the list rate is $0.168 per second, so a clip is $2.10 and $50 buys 23.

Gemini Omni Flash 1.1 lists $0.10 per second at 720p, the same as Wan, and always includes native audio, and Wan 3.0 also lists audio support, so at 720p the two clips have the same price. Kling 3 is the one model here with a separate audio surcharge.

Spending the batch in two passes

A single-pass $50 batch is rarely the best use of the money. A two-pass plan spends part of it on cheap drafts and the rest on a few better renders. For example, 20 Wan 3.0 drafts at 720p cost 20 x $1.25 = $25.00, and 5 Seedance 2.0 Fast finals at $3.03 cost $15.15, for $40.15 in total, inside the $50.00 budget with $9.85 to spare.

The same arithmetic works for any budget: pick the clip price from the table, divide, and keep the remainder as a retry reserve.

Limits to check before you commit

Not every model accepts every combination. Gemini Omni Flash 1.1 runs 3 to 10 s in 16:9 or 9:16, so it fits this batch exactly. Wan 3.0 accepts 2 to 30 s. Read each model's envelope from GET /v1/videos/models; the Video generation and Video Router pages describe the fields.

For a planning rule of thumb, divide your budget by the clip price from the table, then keep about one clip in ten in reserve for takes you discard.