langchain-openai==0.3.9

Changes since langchain-openai==0.3.8

Support for OpenAI Responses API.

Specify use of Responses API as an init param:

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(
    model="gpt-4o-mini",
    use_responses_api=True,
)

ChatOpenAI will also automatically route through the Responses API if a feature specific to that API is used:

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(model="gpt-4o-mini")

llm.invoke(
    "What was a positive news story from today?",
    tools=[{"type": "web_search_preview"}],
)

Details:

openai[patch]: release 0.3.9 (#30325)
openai[patch]: support additional Responses API features (#30322)
openai[patch]: support structured output via Responses API (#30265)
openai[patch]: support Responses API (#30231)
standard-tests, openai: bump core (#30202)