3-minute explainer video, all in: $3.25 of API calls on Sume

A 3-minute explainer from voiceover, music, 8 stills, 6 short clips and a Timeline render costs $3.25 on Sume, itemized line by line.

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A 3-minute explainer made from a 2,700-character voiceover, one music track, eight stills, six 5-second clips and one Timeline render costs $3.24825 on Sume in API calls. The Timeline render itself is $0.30, and the 6 clips are the largest line at $1.875.

The line items

Each line uses a list price from the Sume catalog. TTS is $0.0475 per 1,000 characters, music is a flat $0.125, Nano Banana 2.1 at 1K is $0.10 per image, Wan 3.0 at 480p is $0.0625 per second, a Timeline render is $0.10 per output minute (ceil), and compose is $0.02 per job.

The sum is $0.12825 + $0.125 + $0.80 + $1.875 + $0.30 + $0.02 = $3.24825.

Itemized API cost of one 3-minute explainer, as of 2026-10-09
ItemMathCost
TTS narration, 2,700 characters2.7 x $0.0475$0.12825
Music, 1 generationflat$0.125
8 stills, Nano Banana 2.1 1K8 x $0.10$0.80
6 Wan 3.0 clips, 5 s, 480p30 s x $0.0625$1.875
Timeline render, 3 minutes3 x $0.10$0.30
Timeline compose, 1 jobflat$0.02
Total$3.24825

What is cheap and what is not

The voice, music, render and compose together are $0.57. The pictures and clips are the other $2.675. If you replace the six Wan clips with six more stills, the clips line falls from $1.875 to 6 x $0.10 = $0.60, and the total to $1.97325.

Raising the clips to 720p doubles that line to $3.75, and the total to $5.12325. Resolution on motion is the most sensitive choice in the stack.

What the total leaves out

The figure covers one pass. Retakes multiply the lines you retry, so a plan that expects two takes on every clip and three on the music is 12 clips ($3.75) and 3 music generations (0.375). Captions, trims and filters are separate small jobs at $0.02 each in the catalog.

A 3-minute render is exactly 180 seconds, so it bills 3 minutes. A 181-second render would bill 4 minutes and reserve $0.40; trim a second to keep it at $0.30.

  • Render: ceil(minutes) x $0.10
  • Compose: $0.02 per job
  • Trim, filter: $0.02 per job

A second scenario

Scale to a month of explainers. Ten explainers of this shape cost 10 x $3.24825 = $32.4825, about $32.48, before retakes. If each needs one extra set of six clips, add 10 x $1.875 = $18.75, and the month is $51.2325. The clips are the line to watch; the voice and render lines barely move.

Next step

Use the Timeline docs page for the slot format, and the Jobs and results page for polling. Assemble from Sume-hosted media only: the Timeline requires Sume-hosted source URLs.

Reproduce the numbers

Open https://api.sume.com/v1/catalog, which needs no key, and find the entry for the product. Each model_pricing row carries price, unit, pricing_basis and the estimated, minimum and maximum cents. Multiply the unit price by your quantity and round only at the end. The catalog also has applied_* fields that include an agent fee of 550 basis points; the figures in this post use the base prices.

Sources

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