From 4ba222148d825d790427f7443f71a06275015856 Mon Sep 17 00:00:00 2001
From: Shahrukh Shaik <144558473+shahrukh-shaik@users.noreply.github.com>
Date: Fri, 22 Aug 2025 01:00:12 +0530
Subject: [PATCH] fix(openai): Chat Message `Annotations` defaults to `[ ]` if
 not list or None (#32614)

---
 libs/partners/openai/langchain_openai/chat_models/base.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libs/partners/openai/langchain_openai/chat_models/base.py b/libs/partners/openai/langchain_openai/chat_models/base.py
index b01a560e232..1783bd052f5 100644
--- a/libs/partners/openai/langchain_openai/chat_models/base.py
+++ b/libs/partners/openai/langchain_openai/chat_models/base.py
@@ -3875,7 +3875,9 @@ def _construct_lc_result_from_responses_api(
                         "annotations": [
                             annotation.model_dump()
                             for annotation in content.annotations
-                        ],
+                        ]
+                        if isinstance(content.annotations, list)
+                        else [],
                         "id": output.id,
                     }
                     content_blocks.append(block)