fix(openai): accommodate dict response items in streaming (#36899)

libs/partners/openai/langchain_openai/chat_models/base.py

@@ -4589,6 +4589,15 @@ def _construct_lc_result_from_responses_api(
     return ChatResult(generations=[ChatGeneration(message=message)])
 
 
+def _coerce_chunk_response(resp: Any) -> Any:
+    # dict `response` items on stream events have been observed in the wild
+    if isinstance(resp, dict):
+        from openai.types.responses import Response
+
+        return Response.model_validate(resp)
+    return resp
+
+
 def _convert_responses_chunk_to_generation_chunk(
     chunk: Any,
     current_index: int,  # index in content
@@ -4686,14 +4695,16 @@ def _convert_responses_chunk_to_generation_chunk(
             }
         )
     elif chunk.type == "response.created":
-        id = chunk.response.id
+        response = _coerce_chunk_response(chunk.response)
-        response_metadata["id"] = chunk.response.id  # Backwards compatibility
+        id = response.id
+        response_metadata["id"] = response.id  # Backwards compatibility
     elif chunk.type in ("response.completed", "response.incomplete"):
+        response = _coerce_chunk_response(chunk.response)
         msg = cast(
             AIMessage,
             (
                 _construct_lc_result_from_responses_api(
-                    chunk.response, schema=schema, output_version=output_version
+                    response, schema=schema, output_version=output_version
                 )
                 .generations[0]
                 .message

libs/partners/openai/tests/unit_tests/chat_models/test_responses_stream.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import copy
 from typing import Any
 from unittest.mock import MagicMock, patch
 
@@ -986,3 +987,32 @@ def test_responses_stream_function_call_preserves_namespace() -> None:
     assert first_block.get("namespace") == "my_namespace", (
         f"Expected namespace 'my_namespace', got {first_block.get('namespace')}"
     )
+
+
+def test_responses_stream_tolerates_dict_response_field() -> None:
+    """Regression test for `AttributeError: 'dict' object has no attribute 'id'`.
+
+    The OpenAI SDK types `<event>.response` strictly as `Response`, but raw dicts
+    have been observed in the wild.
+    """
+    stream = copy.deepcopy(responses_stream)
+    first_event = stream[0]
+    assert isinstance(first_event, ResponseCreatedEvent)
+    first_event.response = first_event.response.model_dump(mode="json")  # type: ignore[assignment]
+    assert isinstance(first_event.response, dict)
+
+    llm = ChatOpenAI(model="o4-mini", use_responses_api=True)
+    mock_client = MagicMock()
+
+    def mock_create(*args: Any, **kwargs: Any) -> MockSyncContextManager:
+        return MockSyncContextManager(stream)
+
+    mock_client.responses.create = mock_create
+
+    full: BaseMessageChunk | None = None
+    with patch.object(llm, "root_client", mock_client):
+        for chunk in llm.stream("test"):
+            assert isinstance(chunk, AIMessageChunk)
+            full = chunk if full is None else full + chunk
+    assert isinstance(full, AIMessageChunk)
+    assert full.id == "resp_123"

libs/partners/openai/uv.lock

@@ -624,7 +624,7 @@ typing = [
 
 [[package]]
 name = "langchain-core"
-version = "1.3.0a2"
+version = "1.3.0"
 source = { editable = "../../core" }
 dependencies = [
     { name = "jsonpatch" },
@@ -1120,7 +1120,7 @@ wheels = [
 
 [[package]]
 name = "openai"
-version = "2.29.0"
+version = "2.32.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
@@ -1132,9 +1132,9 @@ dependencies = [
     { name = "tqdm" },
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/b4/15/203d537e58986b5673e7f232453a2a2f110f22757b15921cbdeea392e520/openai-2.29.0.tar.gz", hash = "sha256:32d09eb2f661b38d3edd7d7e1a2943d1633f572596febe64c0cd370c86d52bec", size = 671128, upload-time = "2026-03-17T17:53:49.599Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/ed/59/bdcc6b759b8c42dd73afaf5bf8f902c04b37987a5514dbc1c64dba390fef/openai-2.32.0.tar.gz", hash = "sha256:c54b27a9e4cb8d51f0dd94972ffd1a04437efeb259a9e60d8922b8bd26fe55e0", size = 693286, upload-time = "2026-04-15T22:28:19.434Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/d0/b1/35b6f9c8cf9318e3dbb7146cc82dab4cf61182a8d5406fc9b50864362895/openai-2.29.0-py3-none-any.whl", hash = "sha256:b7c5de513c3286d17c5e29b92c4c98ceaf0d775244ac8159aeb1bddf840eb42a", size = 1141533, upload-time = "2026-03-17T17:53:47.348Z" },
+    { url = "https://files.pythonhosted.org/packages/1e/c1/d6e64ccd0536bf616556f0cad2b6d94a8125f508d25cfd814b1d2db4e2f1/openai-2.32.0-py3-none-any.whl", hash = "sha256:4dcc9badeb4bf54ad0d187453742f290226d30150890b7890711bda4f32f192f", size = 1162570, upload-time = "2026-04-15T22:28:17.714Z" },
 ]
 
 [[package]]