Update app.py

app.py

@@ -9,7 +9,7 @@ app = FastAPI()
 # Define a request model for the prompt and optional model name
 class GenerateRequest(BaseModel):
     prompt: str
-    model: str | None = "openai/gpt-4.1-mini"  # Default model
+    model: str 
 
 async def generate_ai_response(prompt: str, model: str):
     # Configuration for unofficial GitHub AI endpoint