AI context windows: Why context quality beats context size

AI agents often face challenges due to poor context quality rather than inadequate model performance, as the information fed into their context windows can be outdated, irrelevant, or contradictory. This article highlights the importance of context engineering, emphasizing that context quality—defined by relevance, completeness, faithfulness, high signal-to-noise ratio, and freshness—significantly impacts agent performance. It outlines various failure modes, including context poisoning, distraction, confusion, clash, and rot, which degrade context quality. The article stresses the importance of precise retrieval over sheer volume, as more context can lead to decreased precision and increased noise. It explores hybrid search techniques, such as combining vector and keyword retrieval, to improve context relevance and suggests using metadata filtering to refine search results. Redis Iris is presented as a solution that integrates retrieval, memory, caching, and data integration, providing a fast and fresh context engine that supports AI agents by maintaining relevant and current information.