UPDATE

app.py

@@ -134,9 +134,9 @@ final_answer = FinalAnswerTool()
 #    num_ctx=8192,
 #)
 model=LiteLLMModel(
-    model_id = "gemini-2.0-flash",
-    api_base = "https://generativelanguage.googleapis.com/v1beta/models",
-    api_key = api_key,
+    model_id = "gemini/gemini-2.0-flash-lite",
+    #api_base = "https://generativelanguage.googleapis.com/v1beta/models",
+    api_key = os.getenv("GEMINI_API_KEY),
     num_ctx=8192,
 )