# 第二章 大模型基础与上下文窗口

要精通上下文工程，首先必须深入理解大语言模型的工作机制，特别是上下文窗口的本质。上下文窗口既是大模型的核心能力所在，也是上下文工程需要优化和管理的关键资源。

本章将从技术原理层面解析大模型如何处理上下文，Token 的概念与计算方式，以及不同模型在上下文处理能力上的差异。这些知识是理解后续技术策略的必要基础。

## 本章内容

* [2.1 大语言模型工作原理](/context_engineering_guide/di-yi-bu-fen-ren-shi-shang-xia-wen-gong-cheng/02_llm_basics/2.1_how_llm_works.md)
* [2.2 上下文窗口的本质](/context_engineering_guide/di-yi-bu-fen-ren-shi-shang-xia-wen-gong-cheng/02_llm_basics/2.2_context_window.md)
* [2.3 Token 与上下文限制](/context_engineering_guide/di-yi-bu-fen-ren-shi-shang-xia-wen-gong-cheng/02_llm_basics/2.3_tokens.md)
* [2.4 主流模型的上下文能力对比](/context_engineering_guide/di-yi-bu-fen-ren-shi-shang-xia-wen-gong-cheng/02_llm_basics/2.4_model_comparison.md)
* [2.5 State Space Model 与 Transformer 的比较](/context_engineering_guide/di-yi-bu-fen-ren-shi-shang-xia-wen-gong-cheng/02_llm_basics/2.5_ssm_vs_transformer.md)
* [本章小结](/context_engineering_guide/di-yi-bu-fen-ren-shi-shang-xia-wen-gong-cheng/02_llm_basics/summary.md)


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