diff --git a/libs/partners/openai/langchain_openai/chat_models/base.py b/libs/partners/openai/langchain_openai/chat_models/base.py
index 0b1f3ef9604..7cb80a7f134 100644
--- a/libs/partners/openai/langchain_openai/chat_models/base.py
+++ b/libs/partners/openai/langchain_openai/chat_models/base.py
@@ -3889,7 +3889,17 @@ def _convert_responses_chunk_to_generation_chunk(
             annotation = chunk.annotation
         else:
             annotation = chunk.annotation.model_dump(exclude_none=True, mode="json")
-        content.append({"annotations": [annotation], "index": current_index})
+        if output_version == "v1":
+            content.append(
+                {
+                    "type": "text",
+                    "text": "",
+                    "annotations": [annotation],
+                    "index": current_index
+                }
+            )
+        else:
+            content.append({"annotations": [annotation], "index": current_index})
     elif chunk.type == "response.output_text.done":
         if output_version == "v1":
             content.append(
diff --git a/libs/partners/openai/tests/cassettes/test_web_search.yaml.gz b/libs/partners/openai/tests/cassettes/test_web_search.yaml.gz
index e99f1c2e13a..c1231c99f98 100644
Binary files a/libs/partners/openai/tests/cassettes/test_web_search.yaml.gz and b/libs/partners/openai/tests/cassettes/test_web_search.yaml.gz differ
diff --git a/libs/partners/openai/tests/integration_tests/chat_models/test_responses_api.py b/libs/partners/openai/tests/integration_tests/chat_models/test_responses_api.py
index fac526c382b..3568b3dd136 100644
--- a/libs/partners/openai/tests/integration_tests/chat_models/test_responses_api.py
+++ b/libs/partners/openai/tests/integration_tests/chat_models/test_responses_api.py
@@ -55,7 +55,7 @@ def _check_response(response: Optional[BaseMessage]) -> None:
 @pytest.mark.default_cassette("test_web_search.yaml.gz")
 @pytest.mark.vcr
 @pytest.mark.parametrize("output_version", ["responses/v1", "v1"])
-def test_web_search(output_version: Literal["v0", "responses/v1", "v1"]) -> None:
+def test_web_search(output_version: Literal["responses/v1", "v1"]) -> None:
     llm = ChatOpenAI(model=MODEL_NAME, output_version=output_version)
     first_response = llm.invoke(
         "What was a positive news story from today?",
@@ -112,7 +112,10 @@ def test_web_search(output_version: Literal["v0", "responses/v1", "v1"]) -> None
     for msg in [first_response, full, response]:
         assert isinstance(msg, AIMessage)
         block_types = [block["type"] for block in msg.content]  # type: ignore[index]
-        assert block_types == ["web_search_call", "text"]
+        if output_version == "responses/v1":
+            assert block_types == ["web_search_call", "text"]
+        else:
+            assert block_types == ["non_standard", "text"]
 
 
 @pytest.mark.flaky(retries=3, delay=1)