# Stable Audio 3 API on Opennan

> Stable Audio 3 API on Opennan: $0.04888 per track, 38% below Stability AI's official $0.08 per track.

- Maker: Stability AI
- Category: Music
- Model id: `stable-audio-3`
- Endpoint: POST https://api.opennan.com/v1/music/generations
- MCP: https://api.opennan.com/v1/mcp (generate_music)
- Page: https://opennan.com/models/stable-audio-3

## Stable Audio 3 API prices

| Tier | Opennan | Official | Below official |
| --- | --- | --- | --- |
| Per track, any length | $0.04888 | $0.08 | 38% below |

Official is the model maker's own list price for the same tier. Where the maker publishes a price, we never sell above it, most tiers at least 10% below.

## Call Stable Audio 3 from code

```bash
curl https://api.opennan.com/v1/music/generations \
  -H "Authorization: Bearer $OPENNAN_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"stable-audio-3","prompt":"Warm lo-fi hip hop, soft piano, vinyl crackle, relaxed tempo","duration":30,"instrumental":true}'

# Then poll until "status" is "succeeded" or "failed":
curl https://api.opennan.com/v1/tasks/<task id> -H "Authorization: Bearer $OPENNAN_KEY"
```

## Stable Audio 3 API questions

### How much does the Stable Audio 3 API cost?

Stable Audio 3 API on Opennan: $0.04888 per track, 38% below Stability AI's official $0.08 per track. Prices are in US dollars per call, shown before you run, and every tier is in the price table.

### How does that compare with the official price?

Stability AI lists $0.08 per track; Opennan charges $0.04888 per track, 38% below. We only sell a tier below the maker's official price, most tiers at least 10% below.

### What inputs does Stable Audio 3 take?

Text prompt.

### Which options can a call set?

Tracks from 10 to 380 seconds.

### How is it billed?

One flat price per track, whatever length you pick.

### What happens if a generation fails?

A failed task is refunded in full. You pay only for results.

### How do I call Stable Audio 3 from an AI agent?

Add the MCP server https://api.opennan.com/v1/mcp with your API key as a bearer token, then call the generate_music tool with model "stable-audio-3". Or send a POST to https://api.opennan.com/v1/music/generations.

## Similar models

- [Stable Audio 3 Small](https://opennan.com/models/stable-audio-3-small): from $0.02821 per track
- [Stable Audio 3 Small SFX](https://opennan.com/models/stable-audio-3-sfx): from $0.02678 per track
- [CassetteAI Music](https://opennan.com/models/cassette-music): from $0.026 per minute of audio (billed per started minute)
- [ACE-Step](https://opennan.com/models/ace-step): from $0.0156 per minute of audio
- [CassetteAI Sound Effects](https://opennan.com/models/cassette-sfx): from $0.013 per track