diff --git a/litellm/assistants/main.py b/litellm/assistants/main.py
index 928b6e8ac2..bf12608b66 100644
--- a/litellm/assistants/main.py
+++ b/litellm/assistants/main.py
@@ -35,7 +35,7 @@ azure_assistants_api = AzureAssistantsAPI()
 
 
 async def aget_assistants(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     client: Optional[AsyncOpenAI] = None,
     **kwargs,
 ) -> AsyncCursorPage[Assistant]:
@@ -72,7 +72,7 @@ async def aget_assistants(
 
 
 def get_assistants(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     client: Optional[Any] = None,
     api_key: Optional[str] = None,
     api_base: Optional[str] = None,
@@ -205,7 +205,7 @@ def get_assistants(
 
 
 async def acreate_assistants(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     client: Optional[AsyncOpenAI] = None,
     **kwargs,
 ) -> Assistant:
@@ -244,7 +244,7 @@ async def acreate_assistants(
 
 
 def create_assistants(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     model: str,
     name: Optional[str] = None,
     description: Optional[str] = None,
@@ -405,7 +405,7 @@ def create_assistants(
 
 
 async def adelete_assistant(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     client: Optional[AsyncOpenAI] = None,
     **kwargs,
 ) -> AssistantDeleted:
@@ -443,7 +443,7 @@ async def adelete_assistant(
 
 
 def delete_assistant(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     assistant_id: str,
     client: Optional[Any] = None,
     api_key: Optional[str] = None,
@@ -586,7 +586,7 @@ def delete_assistant(
 
 
 async def acreate_thread(
-    custom_llm_provider: Literal["openai", "azure"], **kwargs
+    custom_llm_provider: Literal["openai", "azure"] = "openai", **kwargs
 ) -> Thread:
     loop = asyncio.get_event_loop()
     ### PASS ARGS TO GET ASSISTANTS ###
@@ -621,7 +621,7 @@ async def acreate_thread(
 
 
 def create_thread(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     messages: Optional[Iterable[OpenAICreateThreadParamsMessage]] = None,
     metadata: Optional[dict] = None,
     tool_resources: Optional[OpenAICreateThreadParamsToolResources] = None,
@@ -764,7 +764,7 @@ def create_thread(
 
 
 async def aget_thread(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     thread_id: str,
     client: Optional[AsyncOpenAI] = None,
     **kwargs,
@@ -802,7 +802,7 @@ async def aget_thread(
 
 
 def get_thread(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     thread_id: str,
     client=None,
     **kwargs,
@@ -921,7 +921,7 @@ def get_thread(
 
 
 async def a_add_message(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     thread_id: str,
     role: Literal["user", "assistant"],
     content: str,
@@ -974,7 +974,7 @@ async def a_add_message(
 
 
 def add_message(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     thread_id: str,
     role: Literal["user", "assistant"],
     content: str,
@@ -1105,7 +1105,7 @@ def add_message(
 
 
 async def aget_messages(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     thread_id: str,
     client: Optional[AsyncOpenAI] = None,
     **kwargs,
@@ -1150,7 +1150,7 @@ async def aget_messages(
 
 
 def get_messages(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     thread_id: str,
     client: Optional[Any] = None,
     **kwargs,
@@ -1274,7 +1274,7 @@ def arun_thread_stream(
 
 
 async def arun_thread(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     thread_id: str,
     assistant_id: str,
     additional_instructions: Optional[str] = None,
@@ -1341,7 +1341,7 @@ def run_thread_stream(
 
 
 def run_thread(
-    custom_llm_provider: Literal["openai", "azure"],
+    custom_llm_provider: Literal["openai", "azure"] = "openai",
     thread_id: str,
     assistant_id: str,
     additional_instructions: Optional[str] = None,