LangChain has secured $125 million in funding at a $1.25 billion valuation to advance its platform for agent engineering, led by IVP with contributions from existing and new investors. The company is launching new capabilities, including LangChain and LangGraph 1.0, a new Insights Agent, and a no-code agent builder to facilitate the development of reliable agents. LangChain emphasizes the transformation of LLM applications into agents, highlighting the challenges of moving from prototype to production due to the non-deterministic nature of agents. The platform supports the full lifecycle of agent engineering with open-source frameworks and tools for orchestration, memory management, and human-in-the-loop support. LangSmith, a comprehensive platform for agent engineering, offers observability, evaluation, and deployment features to enhance agent reliability using live production data. The company reports significant adoption, with 90 million monthly downloads and utilization by 35 percent of the Fortune 500, marking a substantial increase in its commercial platform's trace volume. LangChain invites developers to engage with its resources and join its expanding team, supported by strategic partnerships with investors like ServiceNow Ventures and Datadog Ventures.