LangChainLangChain complements PyTorch by providing the orchestration layer above PyTorch-based models. Teams train or fine-tune models in PyTorch, then serve them through LangChain chains for RAG, agents, and conversational interfaces.
Jupyter provides the interactive environment where PyTorch code is written, tested, and debugged. The notebook format allows for iterative model development with immediate visualization of tensors and model outputs.