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Thinking at the Edge of AI

Perspectives on AI strategy, engineering, and building better digital products for UK businesses.

Advanced RAG vs Long-Context WindowsCost · Accuracy · Architecture — choose the right retrieval strategyAdvanced RAGCost/queryMulti-hop acc.58%Simple Q&A88%Best for:High-volume Q&ABudget-sensitive projectsSub-second latency needsLow Cost · FastLong-Context WindowCost/query100×Multi-hop acc.64%Simple Q&A91%Best for:Document comparisonAd-hoc, small corpus (<20 docs)Exploratory analysisHigh Cost · Broad ContextGraphRAGCost/queryMulti-hop acc.89%Simple Q&A86%Best for:Multi-hop reasoningEntity relationship analysisComplex corporate knowledgeHighest Accuracy2026 Best Practice: Route queries through a classifierSimple Q → Advanced RAG · Multi-hop / entity Q → GraphRAG · Long-ctx for small corpora onlySource: Microsoft Research 2024 · AI Native Agency 2026
Technical
12 min read

Advanced RAG vs. Long-Context Windows: Which Architecture Should Your Business Choose?

The debate between Retrieval-Augmented Generation and long-context windows is reshaping how businesses build AI knowledge systems. This guide breaks down Advanced RAG, million-token context windows, and the emerging GraphRAG standard, with a clear decision framework for UK technical leaders in 2026.

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