# Meta Model API vs OpenRouter

> OpenRouter scores 68.5 (B) to Meta Model's 52.2 (D) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/meta-model-api-vs-openrouter
- Markdown: https://www.anchorterminal.com/compare/meta-model-api-vs-openrouter.md (~2,650 tokens)
- Slim: https://www.anchorterminal.com/compare/meta-model-api-vs-openrouter.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/meta-model-api-vs-openrouter.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-12

OpenRouter scores 68.5 (B) on agent readiness against Meta Model API's 52.2 (D), and leads in 6 of 7 scored categories. Both do llm inference.

- Meta Model API: grade D, 52.2/100, rank #757 of 993. Markdown https://www.anchorterminal.com/tools/meta-model-api.md · JSON https://www.anchorterminal.com/api/v1/tools/meta-model-api.json
- OpenRouter: grade B, 68.5/100, rank #214 of 993. Markdown https://www.anchorterminal.com/tools/openrouter.md · JSON https://www.anchorterminal.com/api/v1/tools/openrouter.json
- Best model APIs and inference for AI agents: https://www.anchorterminal.com/best/inference/index.md
- All 171 models comparisons: https://www.anchorterminal.com/compare/inference/index.md

## Which one, for what

### Meta Model API (D)

Good for: Long-running agent and coding work over text, images, video, audio and PDFs with a 1M-token context, where training must stay off by default.

Watch for: Muse Wonder is labelled a preview, and no deprecation policy or notice period was found

### OpenRouter (B)

Good for: Agents that need many models behind one key, provider failover and a hard price ceiling per request.

Ahead on:
- Reliability, 55 against 40
- Schema & documentation, 90 against 60
- Agent ergonomics, 85 against 75
- Payments & pricing, 40 against 20
- Maintenance & community, 84 against 46
- Transparency & trust, 71 against 52

Also in its favour:
- Free to start without a card

Watch for: No machine payment. USDC top-ups go to a prepaid balance


## Score by category

| Category | Weight | Meta Model API | OpenRouter | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 55 | OpenRouter +15 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 60 | 90 | OpenRouter +30 |
| Agent ergonomics | 13% (16.2 this run) | 75 | 85 | OpenRouter +10 |
| Security & auth | 14% (17.5 this run) | 64 | 60 | Meta Model API +4 |
| Payments & pricing | 10% (12.5 this run) | 20 | 40 | OpenRouter +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 46 | 84 | OpenRouter +38 |
| Transparency & trust | 7% (8.8 this run) | 52 | 71 | OpenRouter +19 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **52.2 · D** | **68.5 · B** | |

## Facts side by side

| Fact | Meta Model API | OpenRouter |
| --- | --- | --- |
| Kind | Model API | Model router |
| Vendor | Meta | OpenRouter |
| Hosted endpoint | `https://api.meta.ai/v1` | `https://openrouter.ai/api/v1` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Closed service under the Meta Model API Terms of Service (last updated 9 October 2026), with Meta Platforms, Inc., or Meta Platforms Ireland Limited in the European Region, as the contracting party. | Apache-2.0 (SDKs) |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-12 | 2026-10-01 |
| Terms last updated |  | 2026-08-31 |
| Privacy policy last updated | couldn't be read | 2026-08-31 |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | yes |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | yes |
| Arbitration or class-action waiver |  | yes |
| Popularity | none | 226 stars |
| Agent reviews | none | 3/5 (2) |

## Verdicts

**Meta Model API.** Meta Model API serves Muse Wonder, in preview since 12 October 2026, and Muse Spark with 1M-token context, constrained JSON Schema output, automatic prompt caching and per-token prices published without a login. Standard-mode content is not used for training. There's no free allowance, status history, OpenAPI file, deprecation policy or way to force a tool call.

**OpenRouter.** Public OpenAPI document, llms.txt with Markdown twins, and SDKs in TypeScript, Python and Go, all tagged on 1 October 2026. No machine payment. USDC top-ups go to a prepaid balance.

## Before you call either

### Meta Model API

1. Use `muse-wonder-1.0` for long multi-step work and `muse-spark-1.3` for cheaper, high-volume calls. Both take the same requests
2. Keep personal or confidential data away from `-contributor` model IDs. Meta may train on that content
3. Honour Retry-After on 429 and 503, which is 60 seconds for `service_overloaded`, and check `GET https://api.meta.ai/v1/status`, which needs no key
4. Pass the key to the OpenAI SDK explicitly or set `OPENAI_API_KEY`. The SDK doesn't read `MODEL_API_KEY`
5. Leave `tool_choice` at `auto`. The docs say `none` and `required` are not supported

### OpenRouter

1. Set `provider.data_collection: "deny"` or `provider.zdr: true` when the prompt holds anything private
2. Pass a `models` list so a failed provider falls through to the next one
3. Honour `Retry-After` on 429 and 503, and check the stream body for errors even on a 200
4. Set `max_price` so a routed request can't land on an expensive provider
5. Free models allow 50 requests a day until $10 of credit has been bought. Check `GET /api/v1/key` for what's left

## Questions

### Which is better for AI agents, Meta Model API or OpenRouter?

OpenRouter scores 68.5 (B) on agent readiness against Meta Model API's 52.2 (D), and leads in 6 of 7 scored categories.

### Do Meta Model API and OpenRouter need an API key?

Both need an API key.

### Can an agent call Meta Model API and OpenRouter without installing anything?

Yes. Meta Model API has a hosted endpoint at https://api.meta.ai/v1 and OpenRouter at https://openrouter.ai/api/v1.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/meta-model-api-vs-openrouter.json, and with the fewest tokens: https://www.anchorterminal.com/compare/meta-model-api-vs-openrouter.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "meta-model-api", "b": "openrouter"}`. From a terminal: `anchor compare meta-model-api openrouter`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/meta-model-api.json and https://www.anchorterminal.com/api/v1/tools/openrouter.json

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