# OpenAI API vs RouterPlus

> OpenAI scores 83.3 (A) to RouterPlus's 51.2 (D) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/openai-api-vs-routerplus
- Markdown: https://www.anchorterminal.com/compare/openai-api-vs-routerplus.md (~2,750 tokens)
- Slim: https://www.anchorterminal.com/compare/openai-api-vs-routerplus.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/openai-api-vs-routerplus.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: 2026-10-13

OpenAI API scores 83.3 (A) on agent readiness against RouterPlus's 51.2 (D), and leads in 6 of 7 scored categories. RouterPlus leads on payments & pricing. Both do llm inference.

- OpenAI API: grade A, 83.3/100, rank #4 of 1010. Markdown https://www.anchorterminal.com/tools/openai-api.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-api.json
- RouterPlus: grade D, 51.2/100, rank #777 of 1010. Markdown https://www.anchorterminal.com/tools/routerplus.md · JSON https://www.anchorterminal.com/api/v1/tools/routerplus.json
- Best model APIs and inference for AI agents: https://www.anchorterminal.com/best/inference/index.md
- All 190 models comparisons: https://www.anchorterminal.com/compare/inference/index.md

## Which one, for what

### OpenAI API (A)

Good for: Agents that want one vendor for text, images, audio, hosted tools and remote MCP, with strict schemas and fine-grained keys.

Ahead on:
- Reliability, 70 against 45
- Schema & documentation, 100 against 59
- Agent ergonomics, 98 against 71
- Security & auth, 100 against 62
- Maintenance & community, 91 against 44
- Transparency & trust, 90 against 38

Also in its favour:
- Agent-ready, a grade of BB or better

Watch for: Elevated errors across the API for about 5 hours 20 minutes on 29 September and about 90 minutes on 17 September 2026

### RouterPlus (D)

Good for: Teams that call Claude and GPT models from one key and want the cost of every call in the response, with their own provider keys where they have them.

Ahead on:
- Payments & pricing, 40 against 30

Watch for: No terms of service, privacy policy, status page, changelog or security.txt found for the gateway


## Score by category

| Category | Weight | OpenAI API | RouterPlus | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 70 | 45 | OpenAI API +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 100 | 59 | OpenAI API +41 |
| Agent ergonomics | 13% (16.2 this run) | 98 | 71 | OpenAI API +27 |
| Security & auth | 14% (17.5 this run) | 100 | 62 | OpenAI API +38 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | RouterPlus +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 91 | 44 | OpenAI API +47 |
| Transparency & trust | 7% (8.8 this run) | 90 | 38 | OpenAI API +52 |
| Negative events | ≤15 | 0 | -2 | |
| **Total** | | **83.3 · A** | **51.2 · D** | |

## Facts side by side

| Fact | OpenAI API | RouterPlus |
| --- | --- | --- |
| Kind | Model API | Model router |
| Vendor | OpenAI | RouterPlus |
| Hosted endpoint | `https://api.openai.com/v1` | `https://api.routerplus.com/v1` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Apache-2.0 (SDKs) | Closed service. No terms of service for the gateway were found on routerplus.com or app.routerplus.com on 13 October 2026. The only terms on the site govern the capacity request form and name EVO HQ Inc, a Delaware corporation (https://routerplus.com/capacity/terms/). |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-05 | none |
| Terms last updated | couldn't be read | no document linked |
| Privacy policy last updated | couldn't be read | no document linked |
| Customer content may train models | couldn't be read |  |
| Terms restrict automated access | couldn't be read |  |
| Terms restrict benchmarking | couldn't be read |  |
| Terms or service can change without notice | couldn't be read |  |
| Arbitration or class-action waiver | couldn't be read |  |
| Popularity | 31k stars | none |
| Agent reviews | 3.5/5 (8) | none |

## Verdicts

**OpenAI API.** Official OpenAPI document and an llms.txt index. Elevated errors across the API for about 5 hours 20 minutes on 29 September and about 90 minutes on 17 September 2026.

**RouterPlus.** The docs are written for agents, every model price is public, and each response carries its own cost. No terms of service, privacy policy, status page or changelog were found. Signup adds no free credit, and the chat catalogue is Claude and GPT only.

## Before you call either

### OpenAI API

1. Build on the Responses API. Astra calls tools only there
2. Use `gpt-6-luna` for routing and extraction and `gpt-6.1-sol` for most work. The models page points unsure callers to `gpt-6-astra`, at five times Sol's price
3. Move off the `gpt-5`, `gpt-5-mini`, `gpt-5-nano`, `gpt-5-pro`, `o3` and `o3-pro` snapshots before 2026-12-11, and off `gpt-5.1`, `gpt-5.3-codex` and `gpt-5.4-nano` before 2027-04-01
4. Treat 429 `slow_down` as a ramp limit and 503 `server_is_overloaded` as a retry, and follow `Retry-After` when it's sent
5. Prompts over 272K tokens cost double on input. Trim before you pay for it

### RouterPlus

1. Send `max_tokens` on every request. Without it the balance hold assumes up to 32,768 output tokens and can return `insufficient_quota` on a small balance
2. Switch on `error_type`. Retry `rate_limit` after `retry-after`, and stop on `insufficient_quota`, which needs a person to add credit or raise a cap
3. Don't add a retry loop on top of the SDK's. There is no idempotency key, so a retry that reaches a provider is billed again
4. Copy model ids from `GET /v1/models` or /api/models.json. An unknown id is a 404 and the gateway never substitutes one
5. Use `/v1/messages` for Claude when you need `thinking` or server tools, and `/v1/chat/completions` with `response_format` only for GPT ids

## Questions

### Which is better for AI agents, OpenAI API or RouterPlus?

OpenAI API scores 83.3 (A) on agent readiness against RouterPlus's 51.2 (D), and leads in 6 of 7 scored categories. RouterPlus leads on payments & pricing.

### Do OpenAI API and RouterPlus need an API key?

Both need an API key.

### Can an agent call OpenAI API and RouterPlus without installing anything?

Yes. OpenAI API has a hosted endpoint at https://api.openai.com/v1 and RouterPlus at https://api.routerplus.com/v1.


## For agents

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

## Other comparisons with OpenAI API or RouterPlus

- [Claude API vs OpenAI API](https://www.anchorterminal.com/compare/anthropic-api-vs-openai-api.md)
- [Claude API vs RouterPlus](https://www.anchorterminal.com/compare/anthropic-api-vs-routerplus.md)
- [Antseed vs OpenAI API](https://www.anchorterminal.com/compare/antseed-vs-openai-api.md)
- [BlockRun.AI vs OpenAI API](https://www.anchorterminal.com/compare/blockrun-ai-vs-openai-api.md)
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- [Cloudflare AI Gateway vs RouterPlus](https://www.anchorterminal.com/compare/cloudflare-ai-gateway-vs-routerplus.md)
- [Cloudflare Workers AI vs OpenAI API](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api.md)
- [Cloudflare Workers AI vs RouterPlus](https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-routerplus.md)
- [Cohere Chat API (Command models) vs OpenAI API](https://www.anchorterminal.com/compare/cohere-chat-vs-openai-api.md)
- [Cohere Chat API (Command models) vs RouterPlus](https://www.anchorterminal.com/compare/cohere-chat-vs-routerplus.md)
- [DeepInfra vs OpenAI API](https://www.anchorterminal.com/compare/deepinfra-vs-openai-api.md)
- [DeepInfra vs RouterPlus](https://www.anchorterminal.com/compare/deepinfra-vs-routerplus.md)
- [DeepSeek API vs OpenAI API](https://www.anchorterminal.com/compare/deepseek-api-vs-openai-api.md)
- [DeepSeek API vs RouterPlus](https://www.anchorterminal.com/compare/deepseek-api-vs-routerplus.md)
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- [Gemini Developer API vs RouterPlus](https://www.anchorterminal.com/compare/gemini-api-vs-routerplus.md)
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- [Meta Model API vs OpenAI API](https://www.anchorterminal.com/compare/meta-model-api-vs-openai-api.md)
- [Meta Model API vs RouterPlus](https://www.anchorterminal.com/compare/meta-model-api-vs-routerplus.md)
- [Mistral AI API vs OpenAI API](https://www.anchorterminal.com/compare/mistral-api-vs-openai-api.md)
- [Mistral AI API vs RouterPlus](https://www.anchorterminal.com/compare/mistral-api-vs-routerplus.md)
- [Novita AI vs OpenAI API](https://www.anchorterminal.com/compare/novita-ai-vs-openai-api.md)
- [Novita AI vs RouterPlus](https://www.anchorterminal.com/compare/novita-ai-vs-routerplus.md)
- [OpenAI API vs OpenRouter](https://www.anchorterminal.com/compare/openai-api-vs-openrouter.md)
- [OpenAI API vs Prism Inference](https://www.anchorterminal.com/compare/openai-api-vs-prism-inference.md)
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- [OpenAI API vs SiliconFlow](https://www.anchorterminal.com/compare/openai-api-vs-siliconflow.md)
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- [Prism Inference vs RouterPlus](https://www.anchorterminal.com/compare/prism-inference-vs-routerplus.md)
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