diff --git a/libs/partners/openai/langchain_openai/chat_models/azure.py b/libs/partners/openai/langchain_openai/chat_models/azure.py
index df634cedec874..0bfd220888eff 100644
--- a/libs/partners/openai/langchain_openai/chat_models/azure.py
+++ b/libs/partners/openai/langchain_openai/chat_models/azure.py
@@ -527,6 +527,28 @@ class Joke(BaseModel):
     Used for tracing and token counting. Does NOT affect completion.
     """
 
+    disabled_params: Optional[Dict[str, Any]] = Field(default=None)
+    """Parameters of the OpenAI client or chat.completions endpoint that should be 
+    disabled for the given model.
+
+    Should be specified as ``{"param": None | ['val1', 'val2']}`` where the key is the 
+    parameter and the value is either None, meaning that parameter should never be
+    used, or it's a list of disabled values for the parameter.
+
+    For example, older models may not support the 'parallel_tool_calls' parameter at 
+    all, in which case ``disabled_params={"parallel_tool_calls: None}`` can ben passed 
+    in.
+    
+    If a parameter is disabled then it will not be used by default in any methods, e.g.
+    in 
+    :meth:`~langchain_openai.chat_models.azure.AzureChatOpenAI.with_structured_output`.
+    However this does not prevent a user from directly passed in the parameter during
+    invocation. 
+    
+    By default, unless ``model_name="gpt-4o"`` is specified, then 
+    'parallel_tools_calls' will be disabled.
+    """
+
     @classmethod
     def get_lc_namespace(cls) -> List[str]:
         """Get the namespace of the langchain object."""
diff --git a/libs/partners/openai/langchain_openai/chat_models/base.py b/libs/partners/openai/langchain_openai/chat_models/base.py
index 3bc8e990699a6..b9c19ea8f98ae 100644
--- a/libs/partners/openai/langchain_openai/chat_models/base.py
+++ b/libs/partners/openai/langchain_openai/chat_models/base.py
@@ -455,6 +455,22 @@ class BaseChatOpenAI(BaseChatModel):
     include_response_headers: bool = False
     """Whether to include response headers in the output message response_metadata."""
     disabled_params: Optional[Dict[str, Any]] = Field(default=None)
+    """Parameters of the OpenAI client or chat.completions endpoint that should be 
+    disabled for the given model.
+    
+    Should be specified as ``{"param": None | ['val1', 'val2']}`` where the key is the 
+    parameter and the value is either None, meaning that parameter should never be
+    used, or it's a list of disabled values for the parameter.
+    
+    For example, older models may not support the 'parallel_tool_calls' parameter at 
+    all, in which case ``disabled_params={"parallel_tool_calls: None}`` can ben passed 
+    in.
+    
+    If a parameter is disabled then it will not be used by default in any methods, e.g.
+    in :meth:`~langchain_openai.chat_models.base.ChatOpenAI.with_structured_output`.
+    However this does not prevent a user from directly passed in the parameter during
+    invocation. 
+    """
 
     model_config = ConfigDict(populate_by_name=True)