diff --git a/litellm/llms/azure/chat/gpt_transformation.py b/litellm/llms/azure/chat/gpt_transformation.py
index 0ae6fad7300..18dad503a59 100644
--- a/litellm/llms/azure/chat/gpt_transformation.py
+++ b/litellm/llms/azure/chat/gpt_transformation.py
@@ -105,6 +105,7 @@ class AzureOpenAIConfig(BaseConfig):
             "modalities",
             "audio",
             "web_search_options",
+            "prompt_cache_key",
         ]
 
     def _is_response_format_supported_model(self, model: str) -> bool:
diff --git a/litellm/llms/openai/chat/gpt_transformation.py b/litellm/llms/openai/chat/gpt_transformation.py
index 6cc09dafc2f..16368907070 100644
--- a/litellm/llms/openai/chat/gpt_transformation.py
+++ b/litellm/llms/openai/chat/gpt_transformation.py
@@ -20,12 +20,12 @@ from typing import (
 import httpx
 
 import litellm
+from litellm.litellm_core_utils.core_helpers import map_finish_reason
 from litellm.litellm_core_utils.llm_response_utils.convert_dict_to_response import (
     _extract_reasoning_content,
     _handle_invalid_parallel_tool_calls,
     _should_convert_tool_call_to_json_mode,
 )
-from litellm.litellm_core_utils.core_helpers import map_finish_reason
 from litellm.litellm_core_utils.prompt_templates.common_utils import get_tool_call_names
 from litellm.litellm_core_utils.prompt_templates.image_handling import (
     async_convert_url_to_base64,
@@ -161,6 +161,7 @@ class OpenAIGPTConfig(BaseLLMModelInfo, BaseConfig):
             "web_search_options",
             "service_tier",
             "safety_identifier",
+            "prompt_cache_key",
         ]  # works across all models
 
         model_specific_params = []