Semantic Caching

What Is Semantic Caching?

Traditional caching keys on exact strings, so "reset my password" and "how do I reset password" miss each other. Semantic caching embeds the query and checks vector similarity against cached entries, serving the stored answer when similarity passes a threshold. It cuts cost and latency on repetitive queries common in support and FAQ workloads, but needs a tuned threshold so near-misses do not return wrong answers.