feat(router.py): Fixes https://github.com/BerriAI/litellm/issues/3769

litellm/utils.py

@@ -5811,7 +5811,7 @@ def get_optional_params(
             "mistralai/Mistral-7B-Instruct-v0.1",
             "mistralai/Mixtral-8x7B-Instruct-v0.1",
         ]:
-            supported_params += [
+            supported_params += [  # type: ignore
                 "functions",
                 "function_call",
                 "tools",
@@ -6061,6 +6061,47 @@ def get_optional_params(
     return optional_params
 
 
+def get_non_default_params(passed_params: dict) -> dict:
+    default_params = {
+        "functions": None,
+        "function_call": None,
+        "temperature": None,
+        "top_p": None,
+        "n": None,
+        "stream": None,
+        "stream_options": None,
+        "stop": None,
+        "max_tokens": None,
+        "presence_penalty": None,
+        "frequency_penalty": None,
+        "logit_bias": None,
+        "user": None,
+        "model": None,
+        "custom_llm_provider": "",
+        "response_format": None,
+        "seed": None,
+        "tools": None,
+        "tool_choice": None,
+        "max_retries": None,
+        "logprobs": None,
+        "top_logprobs": None,
+        "extra_headers": None,
+    }
+    # filter out those parameters that were passed with non-default values
+    non_default_params = {
+        k: v
+        for k, v in passed_params.items()
+        if (
+            k != "model"
+            and k != "custom_llm_provider"
+            and k in default_params
+            and v != default_params[k]
+        )
+    }
+
+    return non_default_params
+
+
 def calculate_max_parallel_requests(
     max_parallel_requests: Optional[int],
     rpm: Optional[int],
@@ -6287,7 +6328,7 @@ def get_first_chars_messages(kwargs: dict) -> str:
         return ""
 
 
-def get_supported_openai_params(model: str, custom_llm_provider: str):
+def get_supported_openai_params(model: str, custom_llm_provider: str) -> Optional[list]:
     """
     Returns the supported openai params for a given model + provider
 
@@ -6295,6 +6336,10 @@ def get_supported_openai_params(model: str, custom_llm_provider: str):
     ```
     get_supported_openai_params(model="anthropic.claude-3", custom_llm_provider="bedrock")
     ```
+
+    Returns:
+    - List if custom_llm_provider is mapped
+    - None if unmapped
     """
     if custom_llm_provider == "bedrock":
         if model.startswith("anthropic.claude-3"):
@@ -6534,6 +6579,8 @@ def get_supported_openai_params(model: str, custom_llm_provider: str):
     elif custom_llm_provider == "watsonx":
         return litellm.IBMWatsonXAIConfig().get_supported_openai_params()
 
+    return None
+
 
 def get_formatted_prompt(
     data: dict,