langchain-ai/langchain

langchain-ai/langchain remains the original framework for chaining LLM calls, tools, and memory, and its 136,381 stars keep it on the chart. Despite newer entrants in the AI stack, it still commands a dedicated following due to unmatched flexibility and thoroughly documented 500+ integration recipes. Each release includes 3+ benchmark improvements in latency, proving that community documentation still outweighs shiny new features.