openai[patch]: bump openai sdk (#30461)

[New required
field](https://github.com/openai/openai-python/pull/2223/files#diff-530fd17eb1cc43440c82630df0ddd9b0893cf14b04065a95e6eef6cd2f766a44R26)
for `ResponseUsage` released in 1.66.5.

Author: ccurme

libs/partners/openai/pyproject.toml

@@ -8,7 +8,7 @@ license = { text = "MIT" }
 requires-python = "<4.0,>=3.9"
 dependencies = [
     "langchain-core<1.0.0,>=0.3.48",
-    "openai<2.0.0,>=1.66.3",
+    "openai<2.0.0,>=1.68.2",
     "tiktoken<1,>=0.7",
 ]
 name = "langchain-openai"

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

@@ -34,7 +34,10 @@
 )
 from openai.types.responses.response_output_refusal import ResponseOutputRefusal
 from openai.types.responses.response_output_text import ResponseOutputText
-from openai.types.responses.response_usage import OutputTokensDetails
+from openai.types.responses.response_usage import (
+    InputTokensDetails,
+    OutputTokensDetails,
+)
 from pydantic import BaseModel, Field
 from typing_extensions import TypedDict
 
@@ -1002,6 +1005,7 @@ def test__construct_lc_result_from_responses_api_basic_text_response() -> None:
             input_tokens=10,
             output_tokens=3,
             total_tokens=13,
+            input_tokens_details=InputTokensDetails(cached_tokens=0),
             output_tokens_details=OutputTokensDetails(reasoning_tokens=0),
         ),
     )