OpenRouter gives you a single API key that routes to dozens of providers like Anthropic and OpenAI. Instead of juggling separate keys for each provider, you manage one.
You set the provider to openrouter and prefix the model name with the original provider:
{
"modelRef": "openrouter/anthropic/claude-sonnet-4-5-20250929"
}
OpenRouter also offers a free tier for select models. This is a good way to experiment before committing to a paid plan. The trade-off? Slightly higher latency because requests pass through an extra proxy layer. For most use cases, you won't notice.