diff --git a/litellm/router.py b/litellm/router.py
index 7aa2528504..065905503e 100644
--- a/litellm/router.py
+++ b/litellm/router.py
@@ -801,9 +801,7 @@ class Router:
             kwargs["stream"] = stream
             kwargs["original_function"] = self._acompletion
             self._update_kwargs_before_fallbacks(model=model, kwargs=kwargs)
-
             request_priority = kwargs.get("priority") or self.default_priority
-
             start_time = time.time()
             if request_priority is not None and isinstance(request_priority, int):
                 response = await self.schedule_acompletion(**kwargs)
@@ -1422,7 +1420,7 @@ class Router:
             kwargs["prompt"] = prompt
             kwargs["original_function"] = self._aimage_generation
             kwargs["num_retries"] = kwargs.get("num_retries", self.num_retries)
-            kwargs.setdefault("metadata", {}).update({"model_group": model})
+            self._update_kwargs_before_fallbacks(model=model, kwargs=kwargs)
             response = await self.async_function_with_fallbacks(**kwargs)
 
             return response
@@ -1660,13 +1658,7 @@ class Router:
                 messages=[{"role": "user", "content": "prompt"}],
                 specific_deployment=kwargs.pop("specific_deployment", None),
             )
-            kwargs.setdefault("metadata", {}).update(
-                {
-                    "deployment": deployment["litellm_params"]["model"],
-                    "model_info": deployment.get("model_info", {}),
-                }
-            )
-            kwargs["model_info"] = deployment.get("model_info", {})
+            self._update_kwargs_before_fallbacks(model=model, kwargs=kwargs)
             data = deployment["litellm_params"].copy()
             data["model"]
             for k, v in self.default_litellm_params.items():
@@ -1777,7 +1769,7 @@ class Router:
         messages = [{"role": "user", "content": "dummy-text"}]
         try:
             kwargs["num_retries"] = kwargs.get("num_retries", self.num_retries)
-            kwargs.setdefault("metadata", {}).update({"model_group": model})
+            self._update_kwargs_before_fallbacks(model=model, kwargs=kwargs)
 
             # pick the one that is available (lowest TPM/RPM)
             deployment = await self.async_get_available_deployment(
@@ -2215,7 +2207,7 @@ class Router:
             kwargs["model"] = model
             kwargs["original_function"] = self._acreate_file
             kwargs["num_retries"] = kwargs.get("num_retries", self.num_retries)
-            kwargs.setdefault("metadata", {}).update({"model_group": model})
+            self._update_kwargs_before_fallbacks(model=model, kwargs=kwargs)
             response = await self.async_function_with_fallbacks(**kwargs)
 
             return response
@@ -2320,7 +2312,7 @@ class Router:
             kwargs["model"] = model
             kwargs["original_function"] = self._acreate_batch
             kwargs["num_retries"] = kwargs.get("num_retries", self.num_retries)
-            kwargs.setdefault("metadata", {}).update({"model_group": model})
+            self._update_kwargs_before_fallbacks(model=model, kwargs=kwargs)
             response = await self.async_function_with_fallbacks(**kwargs)
 
             return response
diff --git a/tests/router_unit_tests/test_router_endpoints.py b/tests/router_unit_tests/test_router_endpoints.py
index 0d13b9c610..e876d37662 100644
--- a/tests/router_unit_tests/test_router_endpoints.py
+++ b/tests/router_unit_tests/test_router_endpoints.py
@@ -1,6 +1,8 @@
 import sys
 import os
+import json
 import traceback
+from typing import Optional
 from dotenv import load_dotenv
 from fastapi import Request
 from datetime import datetime
@@ -9,6 +11,7 @@ sys.path.insert(
     0, os.path.abspath("../..")
 )  # Adds the parent directory to the system path
 from litellm import Router, CustomLogger
+from litellm.types.utils import StandardLoggingPayload
 
 # Get the current directory of the file being run
 pwd = os.path.dirname(os.path.realpath(__file__))
@@ -76,19 +79,20 @@ class MyCustomHandler(CustomLogger):
             print("logging a transcript kwargs: ", kwargs)
             print("openai client=", kwargs.get("client"))
             self.openai_client = kwargs.get("client")
+            self.standard_logging_object: Optional[StandardLoggingPayload] = kwargs.get(
+                "standard_logging_object"
+            )
 
         except Exception:
             pass
 
 
-proxy_handler_instance = MyCustomHandler()
-
-
 # Set litellm.callbacks = [proxy_handler_instance] on the proxy
 # need to set litellm.callbacks = [proxy_handler_instance] # on the proxy
 @pytest.mark.asyncio
 @pytest.mark.flaky(retries=6, delay=10)
 async def test_transcription_on_router():
+    proxy_handler_instance = MyCustomHandler()
     litellm.set_verbose = True
     litellm.callbacks = [proxy_handler_instance]
     print("\n Testing async transcription on router\n")
@@ -150,7 +154,9 @@ async def test_transcription_on_router():
 @pytest.mark.parametrize("mode", ["iterator"])  # "file",
 @pytest.mark.asyncio
 async def test_audio_speech_router(mode):
-
+    litellm.set_verbose = True
+    test_logger = MyCustomHandler()
+    litellm.callbacks = [test_logger]
     from litellm import Router
 
     client = Router(
@@ -178,10 +184,19 @@ async def test_audio_speech_router(mode):
         optional_params={},
     )
 
+    await asyncio.sleep(3)
+
     from litellm.llms.openai.openai import HttpxBinaryResponseContent
 
     assert isinstance(response, HttpxBinaryResponseContent)
 
+    assert test_logger.standard_logging_object is not None
+    print(
+        "standard_logging_object=",
+        json.dumps(test_logger.standard_logging_object, indent=4),
+    )
+    assert test_logger.standard_logging_object["model_group"] == "tts"
+
 
 @pytest.mark.asyncio()
 async def test_rerank_endpoint(model_list):