Lyria 3 Clip 30-second music API: ids Sume lists

Lyria 3 Clip (lyria-3-clip-preview) always generates a 30-second clip, but it is not one of the ids in Sume's Music Router catalog. To get a 30-second track from Sume, say so in the prompt and send it to sume/music-auto, lyria-3.5 or lyria-3-pro.

Google's table is from its music generation page; Sume's from the Music Router docs, both read 2026-09-30.

What is Lyria 3 Clip?

Google lists two Lyria models for the Gemini API: Lyria 3 Clip for short clips, loops and previews at 30 seconds, and Lyria 3.5 for full-length songs of a couple of minutes, controllable with the prompt. Both output MP3.

Which ids does Sume accept?

How do I ask for a 30-second track?

Put the length in the prompt. The docs say to steer length there, and the example prompt ends with "A 30-second track." duration and duration_seconds are rejected, so do not send them. Section markers such as [0:00-0:30] Intro: ... also work as a length hint.

curl -X POST https://api.sume.com/v1/music-router/generate \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: clip-30s-001" \
  -d '{
    "model": "sume/music-auto",
    "prompt": "Warm lo-fi hip hop, 84 BPM. A 30-second track. Instrumental, no vocals."
  }'

Will the result be exactly 30 seconds?

Treat the length as a prompt direction, not a guaranteed setting, and check the returned audio. Unlike Clip, which Google says always generates 30 seconds, no Sume field fixes duration. For the limits on prompt text, see prompt length.