LangChain has introduced streaming support to enhance user experience in large language model (LLM) applications. This feature helps reduce perceived latency by returning output tokens one at a time, rather than all at once. The chat-langchain repository now includes streaming and async execution capabilities, which can serve as templates for developers building advanced chat and question/answering applications. Streaming support is currently available for the OpenAI implementation of LLMs, with plans to extend it to other LLMs in the future.