Returns a single Replicate model with its input parameter schema.

The returned parameters are the model's input schema as the provider reports it, so each one can be bound to a literal value or to a benchmark prompt segment. The prompt input is included and takes a segment binding only, because a literal there would replace every benchmark prompt with the same text; it falls back to the prompt's default text segment when a faucet leaves it unbound. Every other input, an image input included, is sent only when the faucet binds it — bind one to an asset segment to send a reference image. num_outputs is excluded: the system supplies it per run and no binding on it is accepted.