diff --git a/litellm/llms/vertex_ai.py b/litellm/llms/vertex_ai.py
index 6d8f6829c6..62ab971f7e 100644
--- a/litellm/llms/vertex_ai.py
+++ b/litellm/llms/vertex_ai.py
@@ -560,7 +560,7 @@ def completion(
                     stream=True,
                     tools=tools,
                 )
-                optional_params["stream"] = True
+
                 return model_response
 
             request_str += f"response = llm_model.generate_content({content})\n"
@@ -632,7 +632,7 @@ def completion(
                     },
                 )
                 model_response = chat.send_message_streaming(prompt, **optional_params)
-                optional_params["stream"] = True
+
                 return model_response
 
             request_str += f"chat.send_message({prompt}, **{optional_params}).text\n"
@@ -664,7 +664,7 @@ def completion(
                     },
                 )
                 model_response = llm_model.predict_streaming(prompt, **optional_params)
-                optional_params["stream"] = True
+
                 return model_response
 
             request_str += f"llm_model.predict({prompt}, **{optional_params}).text\n"
@@ -1045,8 +1045,7 @@ async def async_streaming(
             generation_config=optional_params,
             tools=tools,
         )
-        optional_params["stream"] = True
-        optional_params["tools"] = tools
+
     elif mode == "chat":
         chat = llm_model.start_chat()
         optional_params.pop(
@@ -1065,7 +1064,7 @@ async def async_streaming(
             },
         )
         response = chat.send_message_streaming_async(prompt, **optional_params)
-        optional_params["stream"] = True
+
     elif mode == "text":
         optional_params.pop(
             "stream", None
diff --git a/litellm/main.py b/litellm/main.py
index 177c133856..d83366f5ea 100644
--- a/litellm/main.py
+++ b/litellm/main.py
@@ -1683,13 +1683,14 @@ def completion(
                 or optional_params.pop("vertex_ai_credentials", None)
                 or get_secret("VERTEXAI_CREDENTIALS")
             )
+            new_params = deepcopy(optional_params)
             if "claude-3" in model:
                 model_response = vertex_ai_anthropic.completion(
                     model=model,
                     messages=messages,
                     model_response=model_response,
                     print_verbose=print_verbose,
-                    optional_params=optional_params,
+                    optional_params=new_params,
                     litellm_params=litellm_params,
                     logger_fn=logger_fn,
                     encoding=encoding,
@@ -1705,7 +1706,7 @@ def completion(
                     messages=messages,
                     model_response=model_response,
                     print_verbose=print_verbose,
-                    optional_params=optional_params,
+                    optional_params=new_params,
                     litellm_params=litellm_params,
                     logger_fn=logger_fn,
                     encoding=encoding,