Fix: Model ID ohne openrouter/ prefix

app.py

@@ -25,7 +25,7 @@ async def lifespan(app: FastAPI):
 app = FastAPI(
     title="NeMo DataDesigner API",
     description="Synthetic data generation with DataDesigner + OpenRouter",
-    version="5.1.0",
+    version="5.2.0",
     lifespan=lifespan
 )
 
@@ -66,9 +66,10 @@ def build_config(request):
                 )
             )
 
+    # Model ohne openrouter/ prefix - DataDesigner Provider ist schon "openrouter"
     model_config = ModelConfig(
         alias="openrouter-model",
-        model=f"openrouter/{model_id}",
+        model=model_id,  # arcee-ai/prime ohne prefix
         provider="openrouter",
         inference_parameters=ChatCompletionInferenceParams(
             temperature=request.temperature,