LLM (Large Language Model)
A large language model is a neural network trained on massive text corpora—often trillions of tokens—to predict the next word in a sequence. That simple objective, scaled up, produces systems that can write code, summarize legal briefs, translate languages, and hold surprisingly coherent conversations. GPT-4, Claude, Gemini, and Llama are all LLMs. The "large" refers to parameter count, typically in the billions, which correlates loosely with capability but tightly with compute cost. LLMs are general-purpose by default and useless for specific tasks until you shape their behavior through prompting, fine-tuning, or connecting them to your data. The model is the engine. Everything else—retrieval, guardrails, UI, evaluation—is what makes it drive straight.
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