Music visualizer clip: MiniMax H3 Max, image plus audio reference

For a 10-second visualizer, send the cover art as an image_url and the track excerpt as an audio_url in input_references to minimax-h3-max. At 768p it costs $1.00 on Sume ($0.62 at 480p, $2.00 at 1080p). An audio reference cannot be the only reference, so the image is required; the model limits are nine images, three videos and three audio clips, at most twelve in total (Video Router, read 2026-10-05).

What is the request?

The shape comes from the Video generation guide: input_references entries are tagged image_url or audio_url. H3 Max always produces stereo audio, and there is no generate_audio toggle.

curl -X POST https://api.sume.com/v1/videos \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"minimax-h3-max","prompt":"Abstract waveform ripples radiate from the album cover, neon edges pulse with the beat","duration":10,"resolution":"768p","aspect_ratio":"1:1","input_references":[{"type":"image_url","image_url":{"url":"https://example.com/cover.jpg"}},{"type":"audio_url","audio_url":{"url":"https://example.com/excerpt.mp3"}}]}'

How does the price change with length and resolution?

H3 Max is billed per second by resolution: list $0.05, $0.08 and $0.16 times 1.25. Native renders are 480p and 768p; 1080p is a refinement from the 768p render.

How do I poll and download the result?

A submit returns 202 with id, polling_url, status and model. Poll GET /v1/videos/{id} until status is completed (the other terminal values are failed and cancelled), then download from GET /v1/videos/{id}/content?index=0 with the same bearer key. A sound-only reference with no image comes back as a 400.

curl https://api.sume.com/v1/videos/JOB_ID -H "Authorization: Bearer $SUME_API_KEY"
curl -L "https://api.sume.com/v1/videos/JOB_ID/content?index=0" \
  -H "Authorization: Bearer $SUME_API_KEY" --output clip.mp4

Will the visuals follow the beat?

Do not promise a beat-accurate result: the audio reference conditions the clip, it is not a beat grid. Check the first render and describe the rhythm in the prompt. For the audio side, see directing the audio of MiniMax H3.