Coder Trainee

Oct 11, 2026 · Artificial Intelligence

RAG Evolution: Four Stages from Naive to Agentic (2023-2026) & 2026 Trends

This series finale outlines RAG's evolution through four stages from Naive RAG (2023) to Agentic RAG (2026), identifies key 2026 trends including reasoning-integrated retrieval, multimodal understanding, domain-specific embeddings, and federated knowledge bases, and provides a four-level developer roadmap from beginner to expert.