Architecture

从单模型到多模型：2026年AI应用架构演进指南 # 2026年，单一模型已经无法满足生产级AI应用的需求。本文将带你走过五个架构演进阶段，从最简单的单模型调用到自主多模型代理系统，每一步都配有架构图、代码示例和迁移指南。

RAG 2.0实战：2026年最新检索增强生成架构 # 引言 # 检索增强生成（Retrieval-Augmented Generation, RAG）自2020年被Facebook AI Research首次提出以来，已经成为大语言模型（LLM）应用中最重要的范式之一。到2026年，RAG已经从最初简单的"检索+拼接+生成"模式，演进到了一个全新的阶段——RAG 2.0。

RAG 2.0 in Practice: Latest Retrieval-Augmented Generation Architecture in 2026 # Introduction # Retrieval-Augmented Generation (RAG), first introduced by Facebook AI Research in 2020, has become one of the most critical paradigms in large language model (LLM) applications. By 2026, RAG has evolved from its original naive “retrieve → concatenate → generate” pattern into an entirely new phase — RAG 2.0.

From Single Model to Multi-Model: 2026 AI Application Architecture Evolution Guide # In 2026, a single model can no longer meet the demands of production-grade AI applications. This article walks you through five architecture evolution phases, from the simplest single-model call to autonomous multi-model agent systems, with architecture diagrams, code examples, and migration guides at every step.

AI API网关架构设计：高可用、低延迟的最佳实践 # 2026年，随着 GPT-5、Claude Opus 4、Gemini 2.5 Ultra、Llama 4 405B 等大模型的爆发式增长，AI API调用量呈指数级上升。传统的API网关已无法满足AI场景下的特殊需求——流式传输、超长上下文、多模型路由、Token级别的计费与限流。本文将系统性地介绍AI API网关的架构设计，并以XiDao API网关作为参考实现，帮助你构建一个生产级的高可用、低延迟网关系统。

AI API Gateway Architecture Design: High Availability, Low Latency Best Practices # In 2026, with the explosive growth of large language models like GPT-5, Claude Opus 4, Gemini 2.5 Ultra, and Llama 4 405B, AI API call volumes are increasing exponentially. Traditional API gateways can no longer meet the unique demands of AI workloads — streaming responses, ultra-long contexts, multi-model routing, and token-level billing and rate limiting. This article systematically covers AI API gateway architecture design, using the XiDao API Gateway as a reference implementation to help you build a production-grade, highly available, low-latency gateway system.