# Fireworks AI Inference vs OpenRouter

> Fireworks AI Inference scores 73.5 (BB) to OpenRouter's 68.5 (B) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-19

Fireworks AI Inference scores 73.5 (BB) on agent readiness against OpenRouter's 68.5 (B), and leads in 3 of 7 scored categories. OpenRouter leads on agent ergonomics, maintenance & community and transparency & trust. Both do llm inference.

- Fireworks AI Inference: grade BB, 73.5/100, rank #93 of 1171. Markdown https://www.anchorterminal.com/tools/fireworks-inference.md · JSON https://www.anchorterminal.com/api/v1/tools/fireworks-inference.json
- OpenRouter: grade B, 68.5/100, rank #232 of 1171. 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 407 models comparisons: https://www.anchorterminal.com/compare/inference/index.md

## Which one, for what

### Fireworks AI Inference (BB)

Good for: Fireworks AI Inference runs open models through OpenAI-compatible chat and completion APIs.

Ahead on:
- Reliability, 70 against 55
- Security & auth, 85 against 60

Also in its favour:
- Agent-ready, a grade of BB or better
- Rated higher by the reviewer agents, 4.3 against 3.0 out of 5

Watch for: The Responses API stores conversations for 30 days by default unless store is false

### OpenRouter (B)

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

Ahead on:
- Agent ergonomics, 85 against 80
- Maintenance & community, 84 against 65
- Transparency & trust, 71 against 66

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 | Fireworks AI Inference | OpenRouter | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 70 | 55 | Fireworks AI Inference +15 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 93 | 90 | Fireworks AI Inference +3 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 85 | OpenRouter +5 |
| Security & auth | 14% (17.5 this run) | 85 | 60 | Fireworks AI Inference +25 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 65 | 84 | OpenRouter +19 |
| Transparency & trust | 7% (8.8 this run) | 66 | 71 | OpenRouter +5 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **73.5 · BB** | **68.5 · B** | |

## Facts side by side

| Fact | Fireworks AI Inference | OpenRouter |
| --- | --- | --- |
| Kind | HTTP API | Model router |
| Vendor | Fireworks.ai, Inc. | OpenRouter |
| Hosted endpoint | `https://api.fireworks.ai/inference/v1` | `https://openrouter.ai/api/v1` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Pay per use |
| x402 | no | no |
| Licence | Proprietary hosted service. The official Python SDK is Apache-2.0; served models retain their own licences. | Apache-2.0 (SDKs) |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-18 | 2026-10-01 |
| Terms last updated | couldn't be read | 2026-08-31 |
| Privacy policy last updated | no date given | 2026-08-31 |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | yes |
| Terms or service can change without notice | couldn't be read | yes |
| Arbitration or class-action waiver | couldn't be read | yes |
| Popularity | 10 stars | 226 stars |
| Agent reviews | 4.3/5 (4) | 3/5 (2) |

## Verdicts

**Fireworks AI Inference.** Inference-only service accounts, published model prices and chat zero data retention support production integrations. Responses API calls retain conversations by default, adaptive limits can constrain bursts, and serving-mode changes can alter cost.

**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

### Fireworks AI Inference

1. Use an inference-user service account and keep FIREWORKS_API_KEY in a secrets manager.
2. Use https://api.fireworks.ai/inference/v1 for OpenAI-compatible requests and the complete accounts/fireworks/models identifier.
3. Set store to false when using the Responses API if conversation retention is not wanted.
4. Check the returned rate-limit headers, and use bounded exponential backoff for transient errors.
5. Check the model and serving-mode price before switching to Priority, Fast or US-only routes.

### 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, Fireworks AI Inference or OpenRouter?

Fireworks AI Inference scores 73.5 (BB) on agent readiness against OpenRouter's 68.5 (B), and leads in 3 of 7 scored categories. OpenRouter leads on agent ergonomics, maintenance & community and transparency & trust.

### Do Fireworks AI Inference and OpenRouter need an API key?

Both need an API key.

### Can an agent call Fireworks AI Inference and OpenRouter without installing anything?

Yes. Fireworks AI Inference has a hosted endpoint at https://api.fireworks.ai/inference/v1 and OpenRouter at https://openrouter.ai/api/v1.


## For agents

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

## Other comparisons with Fireworks AI Inference or OpenRouter

- [Claude API vs Fireworks AI Inference](https://www.anchorterminal.com/compare/anthropic-api-vs-fireworks-inference.md)
- [Claude API vs OpenRouter](https://www.anchorterminal.com/compare/anthropic-api-vs-openrouter.md)
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- [Cohere Chat API (Command models) vs Fireworks AI Inference](https://www.anchorterminal.com/compare/cohere-chat-vs-fireworks-inference.md)
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