OpenRouter acts as a model aggregator letting you easily switch between models...

https://bizzmarkblog.com/suprmind-vs-openrouter-what-do-you-lose-if-you-just-use-an-aggregator/

OpenRouter acts as a model aggregator letting you easily switch between models but each call resets the context. Suprmind’s multi-model orchestrator lets you chain models sequentially, keeping context alive throughout