OpenRouter
One API for hundreds of language models
OpenRouter is profiled here as a LLM tool for engineering teams. Read about features, pricing, and how it compares to related options in the tools directory.
Description
OpenRouter is a unified LLM gateway founded in 2023 by OpenSea co-founder Alex Atallah with Louis Vichy. A single OpenAI-compatible endpoint and one billing account route requests to hundreds of models from dozens of providers, so switching models means changing one string in a request body. Routing logic responds to provider outages and price or latency preferences automatically. The catalog spans frontier labs, open-weight hosts, and specialized providers, with new models typically listed within hours of release. Public rankings show which models real applications route traffic to each week.
Key Capabilities:
OpenAI-compatible chat completions across all listed models
Automatic provider fallbacks and uptime-aware routing
Unified billing with pay-as-you-go credits
Free model variants for prototyping
Bring-your-own-key support for direct provider accounts
Usage analytics and public model leaderboards
Alternative tools
- Jina AI
Search foundation models and web reading APIs
- Haystack
Composable pipeline framework for RAG and agent systems
- LlamaIndex
Data framework connecting language models to private documents
- LiteLLM
Open-source gateway that speaks every LLM API
- Cohere
Enterprise models for generation, embeddings, and reranking
- WhyLabs LangKit
Extract structured monitoring signals from LLM prompts and responses