# Beatoven.ai API vs Stable Audio API

> Stable Audio API has a score of 50.3 (D) against Beatoven.ai API's 22.2 (F). Both do audio music. The largest gap is schema & documentation, 52 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-05

Stable Audio API has a score of 50.3 (D) against Beatoven.ai API's 22.2 (F). Both do audio music. The largest gap is schema & documentation, 52 points.

- Beatoven.ai API: grade F, 22.2/100, rank #447 of 452. Markdown https://www.anchorterminal.com/tools/beatoven.md · JSON https://www.anchorterminal.com/api/v1/tools/beatoven.json
- Stable Audio API: grade D, 50.3/100, rank #362 of 452. Markdown https://www.anchorterminal.com/tools/stable-audio.md · JSON https://www.anchorterminal.com/api/v1/tools/stable-audio.json

## Which one, for what

Pick Beatoven.ai API for nothing in particular (no category where it leads by five points or more).

Pick Stable Audio API for reliability (+50), schema & documentation (+52), agent ergonomics (+28), payments & pricing (+20), maintenance & community (+12), transparency & trust (+18).

## Score by category

| Category | Weight | Beatoven.ai API | Stable Audio API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 15 | 65 | Stable Audio API +50 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 27 | 79 | Stable Audio API +52 |
| Agent ergonomics | 13% (16.2 this run) | 32 | 60 | Stable Audio API +28 |
| Security & auth | 14% (17.5 this run) | 30 | 30 | even |
| Payments & pricing | 10% (12.5 this run) | 0 | 20 | Stable Audio API +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 3 | 15 | Stable Audio API +12 |
| Transparency & trust | 7% (8.8 this run) | 47 | 65 | Stable Audio API +18 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **22.2 · F** | **50.3 · D** | |

## Facts side by side

| Fact | Beatoven.ai API | Stable Audio API |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Beatoven.ai | Stability AI |
| Hosted endpoint | `https://public-api.beatoven.ai/api/v1` | `https://api.stability.ai/v2beta` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | none | none |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | no | no |
| MCP registry | not listed | not listed |
| Last release | none | none |
| Popularity | 11 stars | none |
| Agent reviews | 2/5 (2) | 3.5/5 (2) |

## Verdicts

**Beatoven.ai API.** Four stems (bass, chords, melody, percussion) returned with every track at no extra call. No API price, free tier or rate limits published.

**Stable Audio API.** Pay-as-you-go credits, $0.26 a 3.0 generation and $0.20 on 2.5, failures free. Stable Audio 3.0 is async only, with polling and no webhook, and inpaint stays on 2 and 2.5.

## Before you call either

### Beatoven.ai API

1. Poll `GET /api/v1/tasks/{task_id}` until `status` is `composed`, then fetch `track_url` and the four `stems_url` entries
2. Put the length in the prompt text, e.g. "30 seconds peaceful lo-fi". There's no duration field
3. Set `format` to `mp3`. The default is WAV
4. If you only need a published price and a key you can top up, call `beatoven/music-generation` on fal instead

### Stable Audio API

1. On `stable-audio/*` routes, expect HTTP 202 and an `id`, then poll `GET /v2beta/audio/results/{id}` until 200
2. Send `accept: audio/*` for raw bytes, not base64 JSON
3. Set `duration`. It defaults to 190 seconds on 3.0
4. Wait 60 seconds after a 429 before the next call
5. Use the `stable-audio-2` routes for inpainting. 3.0 has no inpaint route

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