Music 1.0 is retiring: keep old calls, move new code to the router

Music 1.0 is being retired gradually, and nothing breaks yet: its routes keep working and keep job.model = sume/music-1.0. But every request already resolves through the Music Router (sume/music-auto), and Sume recommends the router for new integrations. Change the URL for new code, and leave stable old callers alone until you next touch them.

What stays the same

The Music 1.0 documentation states the retirement is gradual. These routes still answer: POST /v1/music-1.0/generate and the model-run alias POST /v1/models/sume/music-1.0/runs. The body is the same on the router plus an optional model, and the price is the same fixed $0.125 per accepted generation.

What changes when you move

Three things. First, the URL. Second, the model field is now yours to set; omit it and you get sume/music-auto, which picks Lyria 3.5 today. Third, job.model now echoes the id you asked for, while job.request.routed_model names the engine that ran, on both the router and the 1.0 routes.

Anything that filtered your job list by job.model == "sume/music-1.0" will not see router jobs. Filter on both, or on the audio artifact type.

• Keep sending prompts of 1 to 5,000 characters.
• Still do not send duration, duration_seconds or a non-empty negative_prompt.
• Pin lyria-3.5 instead of sume/music-auto if you need the same engine on every run.

Migration in one line

The diff is the path and one optional field.

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: migrate-001" \
  -d '{
    "model": "lyria-3.5",
    "prompt": "Cinematic ambient underscore, 70 BPM, D minor. A 30-second track. Instrumental, no vocals."
  }'

When to move

Move now for anything you are writing this week. For stored configs, switch when you need a pinned engine or the catalog. The docs give no shutdown date, so do not hard-code one; check the Music 1.0 page before any planned freeze.