LangChain releases langchain-openai v1.4.1 with LangSmith gateway support

LangChain has released version 1.4.1 of its langchain-openai package, introducing a significant new feature: support for the LangSmith gateway via environment variables. This change, implemented in PR #38742, allows developers to configure LangSmith observability and tracing simply by setting an environment variable, streamlining the integration process. Additionally, the release includes a fix for the gpt-5.3-chat-latest profile (PR #39009), correcting a model reference that had been misconfigured.

This update is part of LangChain's ongoing effort to enhance its ecosystem for building LLM applications. By enabling LangSmith gateway support through environment variables, LangChain reduces boilerplate configuration and makes it easier to adopt LangSmith's debugging and monitoring tools alongside OpenAI models. Developers using langchain-openai can upgrade via pip to take advantage of these improvements, which are particularly valuable for teams scaling production AI systems.