Free Lesson
Tensors in the Search Engine (Why?)
60 min
Sep 24, 2026 1:00 PM
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What you'll learn
Tensor use-cases in retrieval
What are tensors? Where do they help in search? (and where they don't)
Vespa's Tensor Playground
Learn how to experiment with Vespa tensor expressions for fun and profit
Usage patterns for tensors
Tensors in practice: from multi-vector search to chunked documents to custom scoring functions.
Why this topic matters
RAG and Agentic search requires vector search. And increasingly multi-vector retrieval. Vespa's tensor feature implements vector search. "How are tensors better than vectors?" is a common follow-up question, but it sets the wrong frame. Instead, we'll look at how tensors work (in Vespa) and what kind of retrieval problems they help solve. Not every use-case needs it, but those who do, benefit. A lot.
