feat(openai): support openai sdk 2.0 (#33168)

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

@@ -3611,6 +3611,55 @@ def _construct_responses_api_payload(
     return payload
 
 
+def _convert_chat_completions_blocks_to_responses(
+    block: dict[str, Any],
+) -> dict[str, Any]:
+    """Convert chat completions content blocks to responses API format.
+
+    Only handles text, image, file blocks. Others pass through.
+    """
+    if block["type"] == "text":
+        # chat api: {"type": "text", "text": "..."}
+        # responses api: {"type": "input_text", "text": "..."}
+        return {"type": "input_text", "text": block["text"]}
+    if block["type"] == "image_url":
+        # chat api: {"type": "image_url", "image_url": {"url": "...", "detail": "..."}}  # noqa: E501
+        # responses api: {"type": "image_url", "image_url": "...", "detail": "...", "file_id": "..."}  # noqa: E501
+        new_block = {
+            "type": "input_image",
+            "image_url": block["image_url"]["url"],
+        }
+        if block["image_url"].get("detail"):
+            new_block["detail"] = block["image_url"]["detail"]
+        return new_block
+    if block["type"] == "file":
+        return {"type": "input_file", **block["file"]}
+    return block
+
+
+def _ensure_valid_tool_message_content(tool_output: Any) -> Union[str, list[dict]]:
+    if isinstance(tool_output, str):
+        return tool_output
+    if isinstance(tool_output, list) and all(
+        isinstance(block, dict)
+        and block.get("type")
+        in (
+            "input_text",
+            "input_image",
+            "input_file",
+            "text",
+            "image_url",
+            "file",
+        )
+        for block in tool_output
+    ):
+        return [
+            _convert_chat_completions_blocks_to_responses(block)
+            for block in tool_output
+        ]
+    return _stringify(tool_output)
+
+
 def _make_computer_call_output_from_message(message: ToolMessage) -> dict:
     computer_call_output: dict = {
         "call_id": message.tool_call_id,
@@ -3684,8 +3733,7 @@ def _construct_responses_api_input(messages: Sequence[BaseMessage]) -> list:
                 )
                 input_.append(computer_call_output)
             else:
-                if not isinstance(tool_output, str):
-                    tool_output = _stringify(tool_output)
+                tool_output = _ensure_valid_tool_message_content(tool_output)
                 function_call_output = {
                     "type": "function_call_output",
                     "output": tool_output,
@@ -3785,23 +3833,10 @@ def _construct_responses_api_input(messages: Sequence[BaseMessage]) -> list:
                 new_blocks = []
                 non_message_item_types = ("mcp_approval_response",)
                 for block in msg["content"]:
-                    # chat api: {"type": "text", "text": "..."}
-                    # responses api: {"type": "input_text", "text": "..."}
-                    if block["type"] == "text":
-                        new_blocks.append({"type": "input_text", "text": block["text"]})
-                    # chat api: {"type": "image_url", "image_url": {"url": "...", "detail": "..."}}  # noqa: E501
-                    # responses api: {"type": "image_url", "image_url": "...", "detail": "...", "file_id": "..."}  # noqa: E501
-                    elif block["type"] == "image_url":
-                        new_block = {
-                            "type": "input_image",
-                            "image_url": block["image_url"]["url"],
-                        }
-                        if block["image_url"].get("detail"):
-                            new_block["detail"] = block["image_url"]["detail"]
-                        new_blocks.append(new_block)
-                    elif block["type"] == "file":
-                        new_block = {"type": "input_file", **block["file"]}
-                        new_blocks.append(new_block)
+                    if block["type"] in ("text", "image_url", "file"):
+                        new_blocks.append(
+                            _convert_chat_completions_blocks_to_responses(block)
+                        )
                     elif block["type"] in ("input_text", "input_image", "input_file"):
                         new_blocks.append(block)
                     elif block["type"] in non_message_item_types:

libs/partners/openai/pyproject.toml

@@ -8,7 +8,7 @@ license = { text = "MIT" }
 requires-python = ">=3.9.0,<4.0.0"
 dependencies = [
     "langchain-core>=0.3.76,<2.0.0",
-    "openai>=1.104.2,<2.0.0",
+    "openai>=1.104.2,<3.0.0",
     "tiktoken>=0.7.0,<1.0.0",
 ]
 name = "langchain-openai"

libs/partners/openai/tests/integration_tests/chat_models/test_responses_standard.py

@@ -22,6 +22,10 @@ class TestOpenAIResponses(TestOpenAIStandard):
     def chat_model_params(self) -> dict:
         return {"model": "gpt-4o-mini", "use_responses_api": True}
 
+    @property
+    def supports_image_tool_message(self) -> bool:
+        return True
+
     @pytest.mark.xfail(reason="Unsupported.")
     def test_stop_sequence(self, model: BaseChatModel) -> None:
         super().test_stop_sequence(model)

libs/partners/openai/uv.lock

@@ -1,5 +1,5 @@
 version = 1
-revision = 3
+revision = 2
 requires-python = ">=3.9.0, <4.0.0"
 resolution-markers = [
     "python_full_version >= '3.13' and platform_python_implementation == 'PyPy'",
@@ -647,7 +647,7 @@ typing = [
 [package.metadata]
 requires-dist = [
     { name = "langchain-core", editable = "../../core" },
-    { name = "openai", specifier = ">=1.104.2,<2.0.0" },
+    { name = "openai", specifier = ">=1.104.2,<3.0.0" },
     { name = "tiktoken", specifier = ">=0.7.0,<1.0.0" },
 ]
 
@@ -1183,7 +1183,7 @@ wheels = [
 
 [[package]]
 name = "openai"
-version = "1.107.3"
+version = "2.0.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
@@ -1195,9 +1195,9 @@ dependencies = [
     { name = "tqdm" },
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/e3/24/7fb5749bcf66b52209e3ece05cb4eaeae2102e95f8ae77589e8afaf70ba8/openai-1.107.3.tar.gz", hash = "sha256:69bb8032b05c5f00f7660e422f70f9aabc94793b9a30c5f899360ed21e46314f", size = 564194, upload-time = "2025-09-15T20:09:20.159Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/d8/5d/74fa2b0358ef15d113b1a6ca2323cee0034020b085a81a94eeddc6914de9/openai-2.0.0.tar.gz", hash = "sha256:6b9513b485f856b0be6bc44c518831acb58e37a12bed72fcc52b1177d1fb34a8", size = 565732, upload-time = "2025-09-30T17:35:57.632Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/16/1d/58ad0084451f64a9193de48c0afd63047682ffdedb6ae1d494a203e03fd5/openai-1.107.3-py3-none-any.whl", hash = "sha256:4ca54a847235ac04c6320da70fdc06b62d71439de9ec0aa40d5690c3064d4025", size = 947600, upload-time = "2025-09-15T20:09:18.219Z" },
+    { url = "https://files.pythonhosted.org/packages/69/41/86ddc9cdd885acc02ee50ec24ea1c5e324eea0c7a471ee841a7088653558/openai-2.0.0-py3-none-any.whl", hash = "sha256:a79f493651f9843a6c54789a83f3b2db56df0e1770f7dcbe98bcf0e967ee2148", size = 955538, upload-time = "2025-09-30T17:35:54.695Z" },
 ]
 
 [[package]]