What finishing a Seedance 2.5 clip costs: trim, detach, compose, join

After a Seedance 2.5 generation, the finishing steps on Sume (trim, audio detach, crop, compose, audio join, timeline render) are ffmpeg jobs with no provider inference, and the docs list flat or per-minute public rates for them: $0.02 per trim, $0.01 per detach, $0.02 per filter, $0.02 per compose, $0.01 per audio join and $0.10 per output minute for Timeline. The generation is the cost to watch; the polish around it is cents.

Public rates from the Sume docs

The docs point to GET /v1/catalog for the live rate on each; treat these as the docs' public rates as of 2026-10-05. Video frames and video inspect differ: they bill by their own compute (container seconds at Modal list times 1.25, plus a platform fee), and a transcript adds $0.01 per audio minute.

A worked example, in order

Take one 30-second clip and finish it for a vertical placement: trim the first 24 seconds ($0.02), detach the audio ($0.01), swap one line with an audio split and a concat ($0.01 each), crop to a tighter frame ($0.02), and render the final through Timeline ($0.10 for a clip under a minute). The sum of the finishing steps in this example is a few cents; the Seedance job itself is priced by its catalog entry.

• Trim: $0.02
• Detach: $0.01
• Audio split: $0.01
• Audio concat: $0.01
• Crop: $0.02
• Timeline render, under 60 s: $0.10
• Finishing total: $0.17

Budgeting a batch

For a batch, multiply the finishing steps by the number of clips and add them to the generation line. The unbilled plan endpoint for Timeline helps here: run it for each assembly and sum estimated_cost_usd_micros. Remember that the render reserve uses ceil(audio.duration_seconds / 60) minutes, so a 61-second timeline reserves two minutes.

Keep the generation and finishing costs on separate lines in your budget. If finishing costs start to approach a meaningful fraction of the generation, you are probably re-cutting too much, and it is cheaper to fix the prompt and regenerate.

• Sum estimated_cost_usd_micros from plans.
• Round up to whole minutes for renders.
• Track generation and finishing costs separately.

What is not in this table

Speech-to-text, captions and audio generation are separate routes with their own rates, so add them if your pipeline uses them. Storage and delivery are outside these job prices. And the generation line depends on the model, resolution and duration, so quote it from the catalog.

Where to read the generation price

Seedance 2.5's per-second price is not in these media-route pages. Read pricing_skus from GET /v1/videos/models for the id, and use the unbilled POST /v1/timeline-1.0/plan for the assembly estimate. Sume bills list price times 1.25 on each video model, per the Video Router docs.

curl https://api.sume.com/v1/videos/models \
  -H "Authorization: Bearer $SUME_API_KEY"