OpenRouter

OpenRouter is an API gateway that connects you to various large language models through one interface.

Instead of managing separate accounts and integrations with each model provider, you can call multiple models—including major options—using a single API endpoint compatible with OpenAI's SDK.

The service charges per token used with no monthly subscription, often at better rates than going directly to individual providers.

It uses distributed infrastructure to maintain higher uptime and includes tools for routing requests to different models, visualizing performance trade-offs, and optimizing for cost or speed based on your needs.