diff --git a/litellm/proxy/proxy_server.py b/litellm/proxy/proxy_server.py
index d1771cc9088..693769446f4 100644
--- a/litellm/proxy/proxy_server.py
+++ b/litellm/proxy/proxy_server.py
@@ -12481,7 +12481,7 @@ async def supported_openai_params(model: str):
     global llm_router
     try:
         deployments: Final = llm_router.get_model_list(model_name=model) if llm_router is not None else None
-        model_to_map: Final = deployments[0]["litellm_params"]["model"] if deployments else model
+        model_to_map: Final = (deployments[0]["litellm_params"].get("model") or model) if deployments else model
         litellm_model, custom_llm_provider, _, _ = litellm.get_llm_provider(model=model_to_map)
         return {
             "supported_openai_params": litellm.get_supported_openai_params(