add new tutorial

docs/my-website/docs/tutorials/model_fallbacks.md

@@ -0,0 +1,32 @@
+# Basic Model Fallbacks w/ LiteLLM
+
+Here's how you can implement model fallbacks across 3 LLM providers (OpenAI, Anthropic, Azure) using LiteLLM. 
+
+## 1. Install LiteLLM
+```python 
+!pip install litellm
+```
+
+## 2. Complete Code 
+```python 
+import litellm
+from litellm import embedding, completion
+
+# set ENV variables
+os.environ["OPENAI_API_KEY"] = ""
+os.environ["ANTHROPIC_API_KEY"] = ""
+os.environ["AZURE_API_KEY"] = ""
+os.environ["AZURE_API_BASE"] = ""
+os.environ["AZURE_API_VERSION"] = ""
+
+model_fallback_list = ["claude-instant-1", "gpt-3.5-turbo", "chatgpt-test"]
+
+user_message = "Hello, how are you?"
+messages = [{ "content": user_message,"role": "user"}]
+
+for model in model_fallback_list:
+  try:
+      response = completion(model=model, messages=messages)
+  except Exception as e:
+      print(f"error occurred: {traceback.format_exc()}")
+```