Update planner_agent.py

planner_agent.py

@@ -25,6 +25,6 @@ class WebSearchPlan(BaseModel):
 planner_agent = Agent(
     name="PlannerAgent",
     instructions=INSTRUCTIONS,
-    model="gpt-4o-mini",
+    model=gemini_model,
     output_type=WebSearchPlan,
 )