Module router 

Sending each call to the provider the artifact asked for.

model exact "openai/gpt-5.1" names two things: a vendor and a model. The model half is the provider’s business; the vendor half decides which provider, and that decision belongs here rather than in a flag somebody has to remember.

Deliberately vendor-neutral: this knows about prefixes, not about OpenAI or Anthropic. A backend that adds a third provider registers a prefix and changes nothing else.

Structs

RoutingProvider

Dispatches on the vendor/ prefix of a pinned model reference.