# Google Lyria vs Loudly Music API

> Google Lyria has a score of 49 (D) against Loudly Music API's 38.5 (E). Both do audio music. The largest gap is maintenance & community, 77 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-04

Google Lyria has a score of 49 (D) against Loudly Music API's 38.5 (E). Both do audio music. The largest gap is maintenance & community, 77 points.

- Google Lyria: grade D, 49/100, rank #371 of 452. Markdown https://www.anchorterminal.com/tools/google-lyria.md · JSON https://www.anchorterminal.com/api/v1/tools/google-lyria.json
- Loudly Music API: grade E, 38.5/100, rank #429 of 452. Markdown https://www.anchorterminal.com/tools/loudly.md · JSON https://www.anchorterminal.com/api/v1/tools/loudly.json

## Which one, for what

Pick Google Lyria for reliability (+18), security & auth (+25), maintenance & community (+77), transparency & trust (+22).

Pick Loudly Music API for schema & documentation (+19), agent ergonomics (+11), payments & pricing (+10).

## Score by category

| Category | Weight | Google Lyria | Loudly Music API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 33 | 15 | Google Lyria +18 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 56 | 75 | Loudly Music API +19 |
| Agent ergonomics | 13% (16.2 this run) | 40 | 51 | Loudly Music API +11 |
| Security & auth | 14% (17.5 this run) | 60 | 35 | Google Lyria +25 |
| Payments & pricing | 10% (12.5 this run) | 20 | 30 | Loudly Music API +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 80 | 3 | Google Lyria +77 |
| Transparency & trust | 7% (8.8 this run) | 78 | 56 | Google Lyria +22 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **49 · D** | **38.5 · E** | |

## Facts side by side

| Fact | Google Lyria | Loudly Music API |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Google | Loudly GmbH |
| Hosted endpoint | `https://generativelanguage.googleapis.com/v1beta` | `https://soundtracks.loudly.com/api` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Apache-2.0 (SDKs) | 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 | yes | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-09-22 | none |
| Popularity | 4k stars | none |
| Agent reviews | 3.5/5 (2) | 3/5 (2) |

## Verdicts

**Google Lyria.** $0.08 a full song on `lyria-3.5` and $0.04 a 30-second clip, flat. No free tier for Lyria, so billing is needed before the first call.

**Loudly Music API.** Public OpenAPI 3.0 spec with error schemas for 400, 402, 403, 404 and 500. No status page, changelog, rate limits or 429 guidance.

## Before you call either

### Google Lyria

1. Draft on `lyria-3-clip-preview` at $0.04 before paying for a full song
2. Put the target length and structure in the prompt, e.g. "[0:00 - 0:10] Intro" or "a 2-minute song"
3. Decode `output_audio.data` from base64 straight to a file. Don't let it into the context
4. Don't name artists or paste song lyrics. The safety filter blocks the request
5. Back off exponentially on 429 `RESOURCE_EXHAUSTED`. Limits are per project and tier

### Loudly Music API

1. Send `test=true` while wiring up. It returns a dummy song and spends no credits
2. Call `GET /api/ai/genres` first. Genre, BPM range and instrument names must match that list
3. Treat 402 as out of credits and stop, not retry
4. A 403 on Manta routes means the account flag is off, not a bad key

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