> ## Documentation Index > Fetch the complete documentation index at: > Use this file to discover all available pages before exploring further. # Philosophy > LangChain exists to be the easiest place to start building with LLMs, while also being flexible and production-ready. LangChain is driven by a few core beliefs: * Large Language Models (LLMs) are great, powerful new technology. * LLMs are even better when you combine them with external sources of data. * LLMs will transform what th...

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