[Update] Default LLM (#3587)

examples/graph-db-demo/kuzu-example.ipynb

@@ -225,7 +225,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 24,
+      "execution_count": null,
       "metadata": {},
       "outputs": [],
       "source": [
@@ -239,7 +239,7 @@
         "    # Generate Assistant response\n",
         "    system_prompt = f\"You are a helpful AI. Answer the question based on query and memories.\\nUser Memories:\\n{memories_str}\"\n",
         "    messages = [{\"role\": \"system\", \"content\": system_prompt}, {\"role\": \"user\", \"content\": message}]\n",
-        "    response = openai_client.chat.completions.create(model=\"gpt-4o-mini\", messages=messages)\n",
+        "    response = openai_client.chat.completions.create(model=\"gpt-4.1-nano-2025-04-14\", messages=messages)\n",
         "    assistant_response = response.choices[0].message.content\n",
         "\n",
         "    # Create new memories from the conversation\n",