2026-09-29

MiniMax H3 4-second clips: MiniMax says 4, Sume says 5

MiniMax lists 4–15 seconds for H3, but Sume's docs and pricing code start at 5 seconds. Send 5 or more, and trim to 4 afterwards if you need it.

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Can MiniMax H3 make a 4-second clip? MiniMax's own page lists 4–15 seconds, but on Sume minimax-h3 accepts 5–15 seconds, so 4 is below its range. Request 5 seconds and cut the clip to 4 afterwards with Sume's video trim.

The MiniMax figure is from its open-source announcement, read 2026-09-29. Sume's range is from Video generation and its pricing code. The two disagree, so a request built from MiniMax's table alone can miss Sume's range.

What are the two ranges?

From MiniMax's announcement and Sume's Video generation docs, read 2026-09-29.
Source	Output duration
MiniMax's open-source announcement (H3)	4–15 seconds
Sume docs, `minimax-h3`	5–15 seconds
Sume docs, `minimax-h3-max`	5–15 seconds

What is the default length on Sume?

In Sume's pricing code the minimum is 5 seconds, the maximum 15 and the default 5. A request with no duration is priced as a 5-second clip. Send duration as a whole number of seconds from 5 to 15.

How do I get a 4-second clip?

Generate 5 seconds, wait for the job to complete, then cut. Sume's video trim takes one Sume-hosted clip, such as the output of an earlier Sume job, plus start and exactly one of end or duration, and returns a new MP4 holding [start, end). Trimming does not change the source. It needs an Idempotency-Key, so give each trim its own key, and it answers with a job you poll like any other.

curl -X POST https://api.sume.com/v1/video-trim \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: h3-trim-4s-001" \
  -d '{
    "video_url": "https://media.sume.com/artifacts/artf_demo/h3-clip.mp4",
    "start": 0,
    "duration": 4
  }'

Why not just ask for 4 seconds?

A 4 is outside the range Sume documents for the model, and this post does not promise how a request outside it is handled. Send a value inside the documented range. If you send both end and duration to trim, that is a range conflict; see Video trim range conflict.

Do I pay for the extra second?

Sume's pricing code has a per-output-second rate table for minimax-h3, and the request is for 5 seconds, so expect the generation to be priced as 5 seconds even if you keep 4 of them. This post does not cover what the trim job itself costs. MiniMax H3 pricing per second has the rates by resolution.

Which Sume video models start below 5 seconds?

If a native 4-second clip matters more than the model, Sume's docs list lower minimums elsewhere: seedance-2.5 accepts 4–30 seconds, wan-3.0 accepts 2–30 seconds and gemini-omni-flash-1.1 accepts 3–10 seconds. Read supported_durations for the exact set before you pick, because the models differ in inputs and sound, not only length.

How do I check the range before I submit?

Call GET /v1/videos/models and read supported_durations for the id. It lists the whole seconds the model accepts, so it answers the question for whatever the catalog says on the day you call.