OpenRouter / openrouter/auto
Auto Router - access through LLMTR
Auto Router is OpenRouter's general-purpose router for apps, chat and agents. It looks at each request's difficulty, benchmark results, live prices and prompt caching, then picks a model and a reasoning effort. In agent sessions it follows progress across turns, keeps the model while work is going well and adjusts when the task gets stuck.
Technical specifications
| Canonical ID | openrouter/auto |
|---|---|
| Provider | OpenRouter |
| Context window | 2,000,000 tokens |
| Operations | CHAT_COMPLETIONS, RESPONSES |
| Modalities | text, image, audio, video |
Pricing
An 8% platform margin applies to credit top-ups; model usage prices are not separately marked up.
| Operation | Metric | Unit | Price |
|---|---|---|---|
| CHAT_COMPLETIONS | starting | catalog | Not available |
Example usage
With existing OpenAI SDK flows, change only the base URL and model identifier.
curl https://llmtr.com/v1/chat/completions -H "Authorization: Bearer llmtr-your_key" -H "Content-Type: application/json" -d '{"model":"openrouter/auto","messages":[{"role":"user","content":"Hello"}]}'Guides about this model
- OpenRouter Auto Router: how model routing works - Auto Router is OpenRouter's model router for apps, chat and general agents. You can try the id openrouter/auto on LLMTR at https://llmtr.com/v1/chat/completions. This article explains what a router is, how OpenRouter says it decides, which fields to log, and when a pinned model is the better choice.
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