# Stable Audio 2.5 | Text to Audio

Stable Audio 2.5 generates high-quality music and sound effects from text prompts with realistic instruments and sounds.

## API Information

- **Model Slug:** stable-audio-2-5-text-to-audio
- **Branded URL:** https://www.eachlabs.ai/stability/stable-audio/stable-audio-2-5-text-to-audio
- **Provider:** Stability
- **Category:** Text to Voice
- **Output Type:** audio
- **Status:** active
- **Version:** 0.0.1
- **Base Cost:** Fixed pricing: $0.2 per request
- **Estimated Processing Time:** 15 seconds
- **Last Updated:** 2026-04-16
- **Interactive Demo:** https://www.eachlabs.ai/ai-models/stable-audio-2-5-text-to-audio

## Pricing

- **Charge Type:** dynamic
- **Estimated Price (default example):** $0.2000
- **Pricing Details:** Fixed pricing: $0.2 per request

### Pricing Rules

| Condition | Pricing |
| --- | --- |
| Rule 1 | Fixed pricing: $0.2 per request |

## Input Schema

| Parameter | Type | Required | Default | Constraints | Description |
|-----------|------|----------|---------|-------------|-------------|
| prompt | string | Yes | - | - | The prompt to generate audio from |
| seconds_total | integer | No | 190 | 1–190 | The duration of the audio clip to generate |
| num_inference_steps | integer | No | 8 | 4–8 | The number of steps to denoise the audio for |
| guidance_scale | integer | No | 1 | 1–25 | How strictly the diffusion process adheres to the prompt text (higher values make your audio closer to your prompt). |
| seed | integer | No | - | - | - |

## Example Request

```bash
curl -X POST https://api.eachlabs.ai/v1/prediction/ \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "stable-audio-2-5-text-to-audio",
  "input": {
    "prompt": "A gentle guitar melody slowly evolves into a powerful symphonic crescendo"
  }
}'
```

## Output Schema

Response returned by `GET /v1/prediction/{id}` when the job completes:

```json
{
  "status": "success",
  "predictionID": "string",
  "output": "string (URL of generated audio)",
  "metrics": {
    "predict_time": "number (seconds)"
  }
}
```

## Polling

```bash
curl https://api.eachlabs.ai/v1/prediction/{PREDICTION_ID} \
  -H "Authorization: Bearer YOUR_API_KEY"
```

| Status | Meaning |
|--------|---------|
| `processing` | Still running — poll again |
| `success` | Done — read `output` |
| `error` | Failed — read `message` / `details` |

## Webhook (alternative to polling)

Pass `"webhook_url": "https://your.host/path"` in the create request. Eachlabs POSTs this payload when the job ends:

```json
{
  "exec_id": "prediction-uuid",
  "status": "succeeded",
  "output": "https://...",
  "error": ""
}
```

`status` is `"succeeded"` or `"failed"`. `exec_id` equals the `predictionID` from create. Return 2xx within 30 seconds.

## Errors

Error body: `{ "status": "error", "message": "...", "details": "..." }`

| Code | Meaning |
|------|---------|
| `400` | Invalid input |
| `401` | Missing / invalid `Authorization` bearer token |
| `404` | Unknown model or prediction id |
| `429` | Rate limit — 100 creates / min, 10 concurrent per key |
| `5xx` | Retry with backoff |

## Overview

**stable-audio-2-5-text-to-audio — Text-to-Audio AI Model**

Developed by Stability as part of the **stable-audio** family, **stable-audio-2-5-text-to-audio** transforms text prompts into high-quality music tracks and sound effects featuring realistic instruments and immersive audio. This **text-to-audio** model excels at generating structured compositions up to three minutes long, solving the challenge of creating professional-grade audio without studios or musicians for creators and developers seeking **Stability text-to-audio** solutions. Unlike basic sound generators, it produces full tracks with intros, progressions, outros, and stereo effects, making it ideal for **text-to-voice AI model** applications in content production.

## Usage Notes

- API Base URL: `https://api.eachlabs.ai/v1`
- Authentication: send `Authorization: Bearer YOUR_API_KEY`. Generate a key from the Eachlabs dashboard at https://www.eachlabs.ai/dashboard/api-keys.
- File-typed parameters (`*_url`, `image_url`, `video_url`, `audio_url`, etc.) accept publicly-reachable HTTPS URLs only. Upload your asset first (GCS / S3 / your CDN) and pass the resulting URL. Data-URIs and localhost URLs are rejected.
- For structured parameters (arrays / objects) send real JSON values, not stringified payloads.
- Monetary values are reported in USD; per-token / per-megapixel rates may be billed in micro-cents internally.
- Prefer `webhook_url` over polling for long-running predictions — see the Webhook Callback section.