adding model fallback example

cookbook/Untitled156.ipynb

@@ -0,0 +1,52 @@
+{
+  "nbformat": 4,
+  "nbformat_minor": 0,
+  "metadata": {
+    "colab": {
+      "provenance": []
+    },
+    "kernelspec": {
+      "name": "python3",
+      "display_name": "Python 3"
+    },
+    "language_info": {
+      "name": "python"
+    }
+  },
+  "cells": [
+    {
+      "cell_type": "code",
+      "source": [
+        "!pip install litellm"
+      ],
+      "metadata": {
+        "id": "j6yJsCGeaq8G"
+      },
+      "execution_count": null,
+      "outputs": []
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {
+        "id": "u129iWNPaf72"
+      },
+      "outputs": [],
+      "source": [
+        "import litellm\n",
+        "from litellm import embedding, completion\n",
+        "\n",
+        "model_fallback_list = [\"claude-instant-1\", \"gpt-3.5-turbo\", \"chatgpt-test\"]\n",
+        "\n",
+        "user_message = \"Hello, how are you?\"\n",
+        "messages = [{ \"content\": user_message,\"role\": \"user\"}]\n",
+        "\n",
+        "for model in model_fallback_list:\n",
+        "  try:\n",
+        "      response = completion(model=model, messages=messages)\n",
+        "  except Exception as e:\n",
+        "      print(f\"error occurred: {traceback.format_exc()}\")"
+      ]
+    }
+  ]
+}