LTX-2.5 Fast 20-second clip: Sume's nearest rows with Wan 3.0 prices

LTX-2.5 is not a model id on Sume, so you cannot request it there. For a 20-second clip, the nearest Sume rows are Wan 3.0 (2 to 30 seconds, $1.25, $2.50 or $5.00 for 20 seconds) and Seedance 2.5 (4 to 30 seconds, priced by video tokens).

Kling 3, MiniMax H3 and Gemini Omni Flash 1.1 stop at 15, 15 and 10 seconds, so they need two jobs for 20.

What the LTX page says

fal's LTX-2.5 page, which hosts the Lightricks model, lists a Fast variant up to 20 seconds at 720p, 1080p, 1440p or 4K, a Pro variant of 6, 8 or 10 seconds at 720p or 1080p, text, image and audio inputs, native multishot, and synchronized audio. It states the LTX-2.x Community License permits commercial use, with entities of $10M or more in annual revenue needing a paid license from Lightricks (read 2026-10-07).

Twenty seconds on Wan 3.0

Wan is billed per second by resolution, so 20 seconds is simple arithmetic. Sume sells at list times 1.25, rounded up to whole cents.

What you give up and what you gain

You do not get 1440p or 4K at 20 seconds from Sume: Wan tops out at 1080p, and the one 4K row, Gemini Omni Flash 1.1, is capped at 10 seconds. You do not get audio-to-video as a mode either; the closest is passing audio as an input_references entry on Wan 3.0 or Seedance.

In return the API is one contract. POST /v1/videos, a poll URL, a webhook with a signature, an idempotency key and a billable amount reserved at submit. If you need the open weights, license terms and local control, run LTX yourself; Sume does not host it.

• Need 4K at 20 seconds: not on Sume.
• Need 20 seconds at up to 1080p: Wan 3.0.
• Need to run weights locally: use LTX directly.

Request

A 20-second 720p job on Wan 3.0:

curl -X POST "https://api.sume.com/v1/videos" \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"wan-3.0","prompt":"A drone shot follows a train across a valley at sunrise","duration":20,"resolution":"720p","aspect_ratio":"16:9"}'