Direct API access means your app talks straight to a model provider such as OpenAI, Anthropic, Google, or another provider. OpenRouter access means your app talks to OpenRouter, which then routes requests to selected models.

In practice

OpenRouter can simplify model choice and switching. Direct access may give the strongest provider-specific features, contracts, support paths, and policy clarity.

What to watch

The right choice depends on control versus convenience. For production, compare pricing, latency, reliability, data handling, and feature support on the exact models you plan to use.