From 4879e1ecf0eee6fad97d9ac1fe2870e923b3733e Mon Sep 17 00:00:00 2001
From: Krish Dholakia <krrishdholakia@gmail.com>
Date: Fri, 28 Mar 2025 20:24:28 -0700
Subject: [PATCH] fix(openrouter/chat/transformation.py): raise informative
 message for openrouter key error (#9626)

Related Issue: https://github.com/Aider-AI/aider/issues/3550#issuecomment-2763052355
---
 litellm/llms/openrouter/chat/transformation.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/litellm/llms/openrouter/chat/transformation.py b/litellm/llms/openrouter/chat/transformation.py
index 4b95ec87cf..ab4d3c52b9 100644
--- a/litellm/llms/openrouter/chat/transformation.py
+++ b/litellm/llms/openrouter/chat/transformation.py
@@ -84,5 +84,11 @@ class OpenRouterChatCompletionStreamingHandler(BaseModelResponseIterator):
                 model=chunk["model"],
                 choices=new_choices,
             )
+        except KeyError as e:
+            raise OpenRouterException(
+                message=f"KeyError: {e}, Got unexpected response from OpenRouter: {chunk}",
+                status_code=400,
+                headers={"Content-Type": "application/json"},
+            )
         except Exception as e:
             raise e