diff --git a/src/openai/_exceptions.py b/src/openai/_exceptions.py
index 7a30e4a336..2bf8f4ae07 100644
--- a/src/openai/_exceptions.py
+++ b/src/openai/_exceptions.py
@@ -58,7 +58,7 @@ class APIError(OpenAIError):
     If there was no response associated with this error then it will be `None`.
     """
 
-    code: Optional[str] = None
+    code: int | str | None = None
     param: Optional[str] = None
     type: Optional[str]
 
@@ -202,4 +202,4 @@ def __init__(self, message: str, *, unsent_messages: list[str]) -> None:
 class WebSocketQueueFullError(OpenAIError):
     """Raised when the outgoing WebSocket message queue exceeds its byte-size limit."""
 
-    pass
+    pass
\ No newline at end of file