"Hallucination" is the term the AI field settled on for when a language model states something false with the same fluent confidence it uses for something true. It isn't lying in the human sense — the model has no concept of what it doesn't know, so it fills gaps the same …

Anyone building with large language models today eventually runs into the same two names: LangChain and LangGraph. They come from the same company, they're designed to work together, and they're frequently — and incorrectly — treated as competitors. This article explains what each one actually does, how they fit together, and when …