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---
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id: llm
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title: "LLM"
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type: concept
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tags: [AI, language-model, foundation-model]
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sources:
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- "[[LLM Terms Framework]]"
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last_updated: 2025-12-20
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---
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## Definition
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LLM(Large Language Model,大语言模型)是参数规模≥1B的深度学习模型,能够理解和生成人类语言。
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## Core Properties
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- **参数规模**:通常≥10亿参数
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- **语言理解**:能够理解复杂语义
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- **文本生成**:能够生成连贯、合法的文本
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- **上下文学习**:能从少量示例中学习
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## Key Metrics
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- **Token**:基本输入单元
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- 1英文字符 ≈ 0.3 token
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- 1中文字符 ≈ 0.6 token
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- **Context Window**:模型能接受的上下文长度
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## Related Concepts
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- [[Token]]:LLM的基本输入单元
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- [[MCP]]:LLM与外部工具的连接协议
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- [[Agent]]:LLM+MCP的智能体
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- [[RAG]]:扩展LLM能力的技术
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- [[Embedding]]:LLM理解文本的基础
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## Connections
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- [[LLM]] ← uses ← [[Token]]
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- [[LLM]] ← uses ← [[MCP]]
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- [[Agent]] ← combines ← [[LLM]] + [[MCP]]
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- [[RAG]] ← extends ← [[LLM]]
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