Overlapping Model IDs

Hi!

I am using both the APIs of OpenRouter and Nebius for some models and unfortunately they use the same ID for their Microsoft phi 4 model; now I wanted to only use open router for the free models, which seemed to work fine, except that I dont know to which API its sending the request when choosing the Phi 4 model; any idea on how I can change the model id or ensure which one is being called?