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Table Of Contents
Unlocking Data with Generative AI and RAG - Second Edition
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In this code lab, we’ll implement a semantic cache with vector search that intelligently catches similar queries even when phrased differently. We’ll start with a basic ChromaDB-backed cache using sentence transformers, then progressively enhance it with entity masking to generalize across specific values (such as dates or tickers), cross-encoder verification to reduce false positives, adaptive thresholds for different match types, and auto-population that learns from cache misses.
By the end, you’ll have a production-ready semantic cache that can recognize when queries such as “What’s Apple’s stock price?” and “Tell me the current AAPL share value” are asking the same thing, allowing you to return the cached result instantly instead of making another expensive call to your LLM or agent. This means if your agent takes five seconds and costs $0.10 to answer the...