lyria-3-pro-preview vs Sume lyria-3-pro: which model string?

Send lyria-3-pro to Sume, not lyria-3-pro-preview. Google's pricing page lists the engine as lyria-3-pro-preview at $0.08 per full song (read 2026-10-07), while Sume's Music Router accepts sume/music-auto, lyria-3.5 and lyria-3-pro. An unknown id returns 400 model_not_found with a catalog_url.

The ids side by side

Copying a model string from a vendor page into another vendor's API is the quickest way to a 400. Google marks Pro as a preview in its id. Sume publishes its own routable ids and resolves the engine itself.

What you pay on Sume

Every Music Router model charges the fixed Music price per accepted audio generation. Music 1.0 documents it as $0.125 per generation, regardless of prompt length or optional image conditioning. The catalog shows each model's provider list price for reference, but the charge does not vary by model, so choosing Pro does not change the bill.

Prompt rules do not change either: 1 to 5,000 characters, no duration or duration_seconds field, and no non-empty negative_prompt. Put the length in the brief, for example "a 2-minute track" or [0:00-0:30] Intro: ....

Check the catalog before you pin

Read the live list instead of trusting a post. Then pin one id in your config so that a future auto-pick change cannot move your output.

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

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: pro-pin-001" \
  -d '{
    "model": "lyria-3-pro",
    "prompt": "Warm lo-fi hip hop, 84 BPM, C minor. A 30-second track. Instrumental, no vocals."
  }'

Reading the result

job.model echoes the id you requested. job.request.routed_model names the engine that actually ran. If you sent sume/music-auto, read that second field to learn which Lyria rendered the track, and store it next to the audio artifact. Raw provider URLs are not public outputs; use the Sume-hosted media.sume.com URL in result.artifacts[].