OpenRouter: one API for every model

Building anything model-agnostic used to mean juggling a separate SDK, key, and billing relationship for every provider. OpenRouter collapses that into one: a single OpenAI-compatible endpoint that fronts hundreds of models from OpenAI, Anthropic, Google, Meta, and more.

What it gives you

• One integration — a single API key and endpoint for hundreds of models; switch models by changing a string.
• Automatic fallback — if a provider is down or rate-limited, requests route to an alternative instead of failing.
• Routing by price or latency — send each request to the cheapest or fastest option that meets your needs.
• Unified billing — one invoice across every provider, instead of a dozen dashboards.

When to route through it

• Multi-model apps that use different models for different tasks and want one code path.
• Experimentation — benchmark a dozen models against your own prompts without a dozen sign-ups.
• Resilience — fallback across providers so a single outage doesn't take you down.
• Early-stage products avoiding per-provider contracts and minimums before they know what they'll use.

The trade-offs

• An extra hop and a small margin sit between you and the provider.
• You're depending on a middleman for uptime and data handling — worth it for many, a dealbreaker for some.
• Provider-specific features and the very newest models can lag behind going direct.

const client = new OpenAI({
  apiKey: process.env.OPENROUTER_API_KEY,
  baseURL: 'https://openrouter.ai/api/v1',
});
// model: 'anthropic/claude-...' or 'openai/gpt-...' — your choice, one call

OpenRouter trades a thin layer of dependency for the freedom to treat models as interchangeable — which, increasingly, they are.