Update main.py

main.py

@@ -147,8 +147,8 @@ def image_detail(detail_id: int = Path(None, description="The ID of 1.model id a
 
 class Test(BaseModel):
     prompt: str
-    model: str = None
-    neg: str = None
+    model: str = 'gpt-3.5-turbo'
+    neg: str = False
 
 @app.post("/test")
 def test(request: Test):