The "Déjà Vu" Effect: Cutting GenAI Costs with Semantic Caching
There’s a common pattern in enterprise AI: users ask the same questions again and again. Think about your internal knowledge base. Employees constantly ask things like: “How do I reset my VPN?” “What are the Q3 sales figures?” “What’s the company policy on expense reports?” A standard RAG system has no memory of these past interactions. Every time a question comes in, it repeats the same expensive steps: Embed the query Search the vector database Retrieve the top documents Send everything to the LLM (GPT-4, Llama, etc.) Generate an answer Even if the question—and the answer—was identical five minutes ago. This is incredibly wasteful. You’re paying for retrieval and inference on every request, even when nothing has changed. It’s like running a factory production line just to print the same invoice twice. The result is predictable: rising costs and unnecessary latency. The fix is semantic caching —a technique that recognizes repeat intent and serves answers instantly, without re-run...