Category · 14 articles
RAG
Everything about retrieval-augmented generation. Covers RAG architecture, production pipelines, chunking, reranking, evaluation, failure modes, and how RAG compares to fine-tuning and traditional search.
Learning outcome
What this collection helps you do
Design and evaluate a retrieval-augmented generation pipeline, diagnose common failures, and decide when RAG is the right approach.
You will learn to
- 01Connect ingestion, retrieval, reranking, prompting, and generation
- 02Choose chunking and retrieval strategies for the data
- 03Evaluate answer quality and diagnose production failure modes
RAG Evaluation: Build a Reproducible Testing Pipeline
Build a reproducible RAG evaluation pipeline that measures retrieval and generation separately, uses a versioned dataset, and catches regressions in CI.
RAG Over Structured Data: Why Vector Search Fails on Tables (And What Actually Works)
RAG works well on PDFs but breaks on spreadsheets and SQL tables. Here is why vector search struggles with structured data, and the three fixes that work.
Hybrid Search for RAG Explained: BM25, Vector Search, and RRF
Learn how hybrid search improves RAG by combining BM25 keyword retrieval with dense vector search, fusing results with RRF, and evaluating the pipeline on real queries.
RAG Architecture Explained: How Production Pipelines Actually Work (2026)
A practical guide to production RAG architecture, including chunking, embeddings, hybrid search, reranking, query transformation, agentic RAG, evaluation, and the trade-offs between each layer.
RAG Reranking Explained: Models, Metrics, and Production Trade-Offs
Learn how reranking improves RAG retrieval precision, when to use cross-encoders and other rerankers, how to tune candidate depth, and how to evaluate the result.
How to Choose Chunk Size for RAG: A Practical Guide
Learn how to choose chunk size and overlap for RAG using practical starting ranges, document-specific recommendations, retrieval metrics, and a repeatable evaluation workflow.
Prompting, RAG, and In-Context Learning: Using LLMs in Real Products
Knowing how to build a transformer is one thing. Knowing how to use one in production is another. This article covers prompt engineering, few-shot learning, chain-of-thought, retrieval-augmented generation, and why the model's behavior shifts so dramatically based on how you frame your request.
What Is RAG in AI? A Simple Explanation (With Examples)
RAG stands for Retrieval-Augmented Generation. It solves the biggest problem with LLMs - they only know what they were trained on. This guide explains how RAG works, why it exists, and where it is used in production AI systems in 2026.
Why RAG Fails: Every Failure Mode and How to Fix Each One (2026)
RAG fails at retrieval 73% of the time, not generation. This guide covers every production failure mode - chunking artifacts, vocabulary mismatch, lost in the middle, missing reranking, stale indexes, and no evaluation layer - with specific fixes for each, backed by 2025 and 2026 production data.
Why Your Vector Search Returns 'Close But Not Quite Right' Results
Most RAG pipelines stop at the dual encoder. That is the mistake. This guide explains why modern search systems chain dual encoders and cross-encoders together, how each one works, and how to implement the two-stage pipeline in Python.
RAG vs LangChain: What They Are, How They Relate, and Which One You Actually Need
RAG is a retrieval technique. LangChain is an orchestration framework. Comparing them directly is a category error - but the question developers are really asking is whether LangChain is necessary to build a RAG system. This guide answers that with benchmarks, real code, and a decision framework grounded in 2026 production data.
How Embeddings Work in RAG: The Complete Guide (2026)
Embeddings are the invisible foundation of every RAG retrieval pipeline. This guide explains what embeddings are, how transformers produce them, why cosine similarity works, the difference between bi-encoders and cross-encoders, how to choose an embedding model in 2026, and where retrieval quality silently breaks down.
RAG vs Traditional Search: What Changed, What Did Not, and Why BM25 Is Not Dead
Traditional search returns documents. RAG returns answers. That gap sounds simple but it changes everything about how you build, evaluate, and maintain an information retrieval system. This guide breaks down how keyword search, semantic search, and RAG differ, where each wins, and why the best production systems in 2026 combine all three.
RAG vs Fine-Tuning: When to Use Each (2026 Decision Guide)
RAG and fine-tuning solve different problems. RAG changes what the model knows at query time. Fine-tuning changes how the model behaves permanently. This guide breaks down the real cost numbers, failure modes, and a practical decision framework for 2026.