diff --git a/libs/partners/fireworks/langchain_fireworks/chat_models.py b/libs/partners/fireworks/langchain_fireworks/chat_models.py
index fb439a6811..c94d16a2d9 100644
--- a/libs/partners/fireworks/langchain_fireworks/chat_models.py
+++ b/libs/partners/fireworks/langchain_fireworks/chat_models.py
@@ -904,7 +904,7 @@ class ChatFireworks(BaseChatModel):
         else:
             raise ValueError(
                 f"Unrecognized method argument. Expected one of 'function_calling' or "
-                f"'json_format'. Received: '{method}'"
+                f"'json_mode'. Received: '{method}'"
             )
 
         if include_raw:
diff --git a/libs/partners/groq/langchain_groq/chat_models.py b/libs/partners/groq/langchain_groq/chat_models.py
index df49602b73..d791a4c207 100644
--- a/libs/partners/groq/langchain_groq/chat_models.py
+++ b/libs/partners/groq/langchain_groq/chat_models.py
@@ -1034,7 +1034,7 @@ class ChatGroq(BaseChatModel):
         else:
             raise ValueError(
                 f"Unrecognized method argument. Expected one of 'function_calling' or "
-                f"'json_format'. Received: '{method}'"
+                f"'json_mode'. Received: '{method}'"
             )
 
         if include_raw:
diff --git a/libs/partners/openai/langchain_openai/chat_models/base.py b/libs/partners/openai/langchain_openai/chat_models/base.py
index 06be457610..2927427951 100644
--- a/libs/partners/openai/langchain_openai/chat_models/base.py
+++ b/libs/partners/openai/langchain_openai/chat_models/base.py
@@ -1139,7 +1139,7 @@ class BaseChatOpenAI(BaseChatModel):
         else:
             raise ValueError(
                 f"Unrecognized method argument. Expected one of 'function_calling' or "
-                f"'json_format'. Received: '{method}'"
+                f"'json_mode'. Received: '{method}'"
             )
 
         if include_raw: