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---
title: "Large Language Model"
type: concept
tags: [llm, ai, nlp]
last_updated: 2026-04-25
---
## Definition
大语言模型Large Language ModelLLM是基于大规模预训练的深度学习模型能够理解和生成人类语言在推理与生成方面表现出色。
## Core Characteristics
- **知识截止日期**LLM 的知识基于训练数据,存在固定的时间节点,无法自动获取最新信息
- **推理能力强**:能够进行复杂推理、代码生成、文本创作等任务
- **幻觉问题**:可能生成看似合理但实际错误的内容(幻觉)
## Role in AI System Architecture
- **思考层**LLM 作为 AI 系统的"天才大脑",负责逻辑推理和内容生成
- 与 [[RAG]] 配合获取实时信息
- 与 [[AI Agent]] 配合实现自主行动
## Related Concepts
- [[RAG]] — 补充实时知识,降低幻觉
- [[AI Agent]] — 提供行动能力
- [[ReAct Pattern]] — 推理-行动协同模式
## Sources
- [[llms-rag-ai-agent-三个到底什么区别]]
- [[大模型相关术语和框架总结llm-mcp-prompt-rag-vllm-token-数据蒸馏]]