Programming with ChatGPTdpa/picture alliance via Getty Images LangChain, whose AI software helps developers build applications using models like OpenAI’s GPT-4, has raised $100 million in funding at a $1.1 billion valuation, four sources familiar with the deal told Forbes. VC outfit IVP is leading the round, the sources said. The company, which was on the 2025 Forbes AI 50 list and on the 2024 Forbes Next Billion Dollar Startups List, has about $16 million in annualized revenue, two of the sourc...