Stable Audio 3 Medium API

About Stable Audio 3 Medium

Stability AI text-to-audio model for music and sound effects, 44.1 kHz stereo clips up to 380 seconds, with length, step and seed controls.

Also known as Stability AI Stable Audio 3 Medium

Stable Audio 3 Medium specs

Model ID

stable-audio-3-medium

Author

Stability AI

Category

Audio Generation

Released

May 20, 2026

Input

Text

Output

Audio

Endpoints

POST/v1/audio/generations

Alternate model IDs

stabilityai/stable-audio-3-medium

Stable Audio 3 Medium API pricingSave up to 27%

Live pay-as-you-go rates from the EmpirioLabs catalog. You are billed only for what you use, with no monthly minimum.

How to call the Stable Audio 3 Medium API

Stable Audio 3 Medium runs through POST /v1/audio/generations. The request returns a job_id right away; poll GET /v1/jobs/{job_id} until the job completes and read the output URLs from the result. Get an API key from the EmpirioLabs dashboard.

curl https://api.empiriolabs.ai/v1/audio/generations \
  -H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "stable-audio-3-medium",
    "prompt": "Describe what you want Stable Audio 3 Medium to generate."
  }'

curl https://api.empiriolabs.ai/v1/jobs/JOB_ID \
  -H "Authorization: Bearer $EMPIRIOLABS_API_KEY"

import requests

response = requests.post(
    "https://api.empiriolabs.ai/v1/audio/generations",
    headers={"Authorization": "Bearer YOUR_EMPIRIOLABS_API_KEY"},
    json={
        "model": "stable-audio-3-medium",
        "prompt": "Describe what you want Stable Audio 3 Medium to generate.",
    },
)
job = response.json()

# Generation runs as an async job. Poll until it completes.
import time
while True:
    status = requests.get(
        f"https://api.empiriolabs.ai/v1/jobs/{job['job_id']}",
        headers={"Authorization": "Bearer YOUR_EMPIRIOLABS_API_KEY"},
    ).json()
    if status.get("status") in ("completed", "failed"):
        print(status)
        break
    time.sleep(5)

Stable Audio 3 Medium API parameters

Request parameters supported by the Stable Audio 3 Medium API on EmpirioLabs. Defaults apply when a field is omitted.

Good to know

Generates music and sound effects from text: 44.1 kHz stereo, from 1 to 380 seconds per clip. Powered by Stability AI.

Input

• A text prompt describing the music or sound: genre, instruments, mood, tempo, or the effect.
• audio_duration sets the length in seconds, from 1 to 380. The default is 30.
• num_inference_steps from 4 to 8. The default is 8.
• seed repeats a result. Negative prompts, lyrics and audio inputs are not supported.

Output

• MP3 by default, or WAV, FLAC or Ogg with format.
• A signed URL by default, or base64 with response_format set to b64_json.

Billing

• Billed per clip, whatever its length. A request that fails is not billed.

Weights

• FP16.

Stable Audio 3 Medium API: common questions

How much does the Stable Audio 3 Medium API cost?

On EmpirioLabs, Stable Audio 3 Medium is billed pay as you go. The live rate card on this page always matches what the API charges.

Which endpoint does Stable Audio 3 Medium use?

Stable Audio 3 Medium is served through POST /v1/audio/generations on api.empiriolabs.ai with standard bearer-token authentication.

Can I try Stable Audio 3 Medium in the browser before integrating?

Yes. The EmpirioLabs playground runs Stable Audio 3 Medium in the browser with the same parameters the API exposes, so you can test prompts before writing code.

How do I get a Stable Audio 3 Medium API key?

Create an EmpirioLabs account, then generate a key under API Keys in the dashboard. Billing is pay-as-you-go credits, so you only pay for the requests you make.