OpenRouter
openrouter.ai
A unified API gateway that routes requests to dozens of large language models through a single endpoint and API key.
OpenRouter provides a single standardized API that connects to virtually every major language model provider, showing real-time pricing and context window sizes across all of them. Developers can switch models, set fallbacks, and compare outputs without managing separate accounts or keys for each provider.
Why it is useful
Building with LLMs normally means juggling separate API keys, authentication schemes, and client libraries for every provider. OpenRouter collapses all of that into one endpoint. You can swap a model in one line of config, compare pricing across providers in real time, and avoid complete lock-in to any single platform.