diff --git a/src/openai/_models.py b/src/openai/_models.py
index ed4c1f82d6..e5a7ccc03d 100644
--- a/src/openai/_models.py
+++ b/src/openai/_models.py
@@ -657,7 +657,11 @@ def construct_type(*, value: object, type_: object, metadata: Optional[List[Any]
         if not is_mapping(value):
             return value
 
-        _, items_type = get_args(type_)  # Dict[_, items_type]
+        _dict_args = get_args(type_)
+        if len(_dict_args) < 2:
+            return value
+
+        _, items_type = _dict_args  # Dict[_, items_type]
         return {key: construct_type(value=item, type_=items_type) for key, item in value.items()}
 
     if (
diff --git a/src/openai/_utils/_transform.py b/src/openai/_utils/_transform.py
index 414f38c340..6cf4f7f546 100644
--- a/src/openai/_utils/_transform.py
+++ b/src/openai/_utils/_transform.py
@@ -180,7 +180,10 @@ def _transform_recursive(
         return _transform_typeddict(data, stripped_type)
 
     if origin == dict and is_mapping(data):
-        items_type = get_args(stripped_type)[1]
+        _dict_args = get_args(stripped_type)
+        if not _dict_args:
+            return data
+        items_type = _dict_args[1]
         return {key: _transform_recursive(value, annotation=items_type) for key, value in data.items()}
 
     if (
@@ -346,7 +349,10 @@ async def _async_transform_recursive(
         return await _async_transform_typeddict(data, stripped_type)
 
     if origin == dict and is_mapping(data):
-        items_type = get_args(stripped_type)[1]
+        _dict_args = get_args(stripped_type)
+        if not _dict_args:
+            return data
+        items_type = _dict_args[1]
         return {key: _transform_recursive(value, annotation=items_type) for key, value in data.items()}
 
     if (