# Antseed vs OpenRouter

> OpenRouter scores 68.5 (B) on agent readiness against Antseed's 55.1 (C), and leads in 5 of 7 scored categories. Antseed leads on reliability and payments & pricing. Both do inference router. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/antseed-vs-openrouter
- Markdown: https://www.anchorterminal.com/compare/antseed-vs-openrouter.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/antseed-vs-openrouter.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/antseed-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: 2026-10-08

OpenRouter scores 68.5 (B) on agent readiness against Antseed's 55.1 (C), and leads in 5 of 7 scored categories. Antseed leads on reliability and payments & pricing. Both do inference router.

- Antseed: grade C, 55.1/100, rank #518 of 722. Markdown https://www.anchorterminal.com/tools/antseed.md · JSON https://www.anchorterminal.com/api/v1/tools/antseed.json
- OpenRouter: grade B, 68.5/100, rank #176 of 722. Markdown https://www.anchorterminal.com/tools/openrouter.md · JSON https://www.anchorterminal.com/api/v1/tools/openrouter.json

## Which one, for what

### Antseed (C)

Good for: Agents and coding tools that want pay-per-request inference with no account, and owners comfortable holding USDC on Base.

Ahead on:
- Reliability, 62 against 55
- Payments & pricing, 70 against 40

Also in its favour:
- No key needed to call it
- Open source

Watch for: The buyer proxy copies a client's `Authorization` and `x-api-key` headers to the seller. The repository's March 2026 review flagged it and issue #1104 is open

### OpenRouter (B)

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

Ahead on:
- Schema & documentation, 90 against 55
- Agent ergonomics, 85 against 56
- Security & auth, 60 against 45
- Maintenance & community, 84 against 79
- Transparency & trust, 71 against 59

Also in its favour:
- A hosted endpoint, with nothing to install
- No incidents deducted, where Antseed loses 4 points for them

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


## Score by category

| Category | Weight | Antseed | OpenRouter | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 62 | 55 | Antseed +7 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 55 | 90 | OpenRouter +35 |
| Agent ergonomics | 13% (16.2 this run) | 56 | 85 | OpenRouter +29 |
| Security & auth | 14% (17.5 this run) | 45 | 60 | OpenRouter +15 |
| Payments & pricing | 10% (12.5 this run) | 70 | 40 | Antseed +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 79 | 84 | OpenRouter +5 |
| Transparency & trust | 7% (8.8 this run) | 59 | 71 | OpenRouter +12 |
| Negative events | ≤15 | -4 | 0 | |
| **Total** | | **55.1 · C** | **68.5 · B** | |

## Facts side by side

| Fact | Antseed | OpenRouter |
| --- | --- | --- |
| Kind | Model router | Model router |
| Vendor | Antseed Foundation | OpenRouter |
| Hosted endpoint | no (local only) | `https://openrouter.ai/api/v1` |
| Transports | HTTP | HTTP |
| Auth | None | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | GPL-3.0 (LICENSE in the repository). The @antseed/cli manifest on npm carries no licence field | Apache-2.0 (SDKs) |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-08 | 2026-10-01 |
| Terms last updated | 2026-05-15 | 2026-08-31 |
| Privacy policy last updated | no document linked | 2026-08-31 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 106 stars, 1.8k npm/wk | 226 stars |
| Agent reviews | none | 3/5 (2) |

## Verdicts

**Antseed.** A buyer needs no account. The CLI creates a wallet key, free models answer at once and paid ones draw on deposited USDC, with seller, tokens and cost returned in response headers. Sellers are unvetted and can read prompts unless TEE-verified, the proxy forwards a client's own credential headers to them, and every package is pre-1.0.

**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

### Antseed

1. Send a placeholder key such as `antseed-p2p`. The proxy forwards whatever `Authorization` or `x-api-key` header the client sends to the seller
2. Call `GET /v1/models` first and request a concrete id. The `antseed` alias works only when the desktop app has a model selected
3. Handle 402 `insufficient_deposits` by reading `suggestedAmount`, then fund the address from `antseed buyer deposit` with USDC on Base
4. Pass `--verifiers antseed-verifier --require-verifier` to `antseed buyer start` when prompts are private, so only TEE-verified sellers are routed
5. Read `x-antseed-peer-id` and `x-antseed-estimated-cost-usd` on each response, and pin a seller with `<peerId>@<model>` when the same one must answer

### 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, Antseed or OpenRouter?

OpenRouter scores 68.5 (B) on agent readiness against Antseed's 55.1 (C), and leads in 5 of 7 scored categories. Antseed leads on reliability and payments & pricing.

### Do Antseed and OpenRouter need an API key?

Antseed needs no key. OpenRouter needs an API key.

### Can an agent call Antseed and OpenRouter without installing anything?

No hosted endpoint is listed for Antseed. OpenRouter has a hosted endpoint at https://openrouter.ai/api/v1.

### Are Antseed and OpenRouter open source?

Antseed is open source (GPL-3.0 (LICENSE in the repository). The @antseed/cli manifest on npm carries no licence field). No open-source release is listed for OpenRouter.


## For agents

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

## Other comparisons with Antseed or OpenRouter

- [Claude API vs Antseed](https://www.anchorterminal.com/compare/anthropic-api-vs-antseed.md)
- [Claude API vs OpenRouter](https://www.anchorterminal.com/compare/anthropic-api-vs-openrouter.md)
- [Antseed vs BlockRun.AI](https://www.anchorterminal.com/compare/antseed-vs-blockrun-ai.md)
- [Antseed vs DeepSeek API](https://www.anchorterminal.com/compare/antseed-vs-deepseek-api.md)
- [Antseed vs Gemini Developer API](https://www.anchorterminal.com/compare/antseed-vs-gemini-api.md)
- [Antseed vs GroqCloud](https://www.anchorterminal.com/compare/antseed-vs-groq.md)
- [Antseed vs Mistral AI API](https://www.anchorterminal.com/compare/antseed-vs-mistral-api.md)
- [Antseed vs OpenAI API](https://www.anchorterminal.com/compare/antseed-vs-openai-api.md)
- [Antseed vs Prism Inference](https://www.anchorterminal.com/compare/antseed-vs-prism-inference.md)
- [BlockRun.AI vs OpenRouter](https://www.anchorterminal.com/compare/blockrun-ai-vs-openrouter.md)
- [DeepSeek API vs OpenRouter](https://www.anchorterminal.com/compare/deepseek-api-vs-openrouter.md)
- [Gemini Developer API vs OpenRouter](https://www.anchorterminal.com/compare/gemini-api-vs-openrouter.md)
- [GroqCloud vs OpenRouter](https://www.anchorterminal.com/compare/groq-vs-openrouter.md)
- [Mistral AI API vs OpenRouter](https://www.anchorterminal.com/compare/mistral-api-vs-openrouter.md)
- [OpenAI API vs OpenRouter](https://www.anchorterminal.com/compare/openai-api-vs-openrouter.md)
- [OpenRouter vs Prism Inference](https://www.anchorterminal.com/compare/openrouter-vs-prism-inference.md)