RAG Eval Is Broken Because Recall@K Isn't the Metric That Matters
This story is from 2026-09-26. It is preserved in the archive; the latest stories are on the live feed.
TL;DR — Most RAG pipelines are tuned stage-by-stage — chunking, embeddings, re-ranking — using metrics like recall@k and MRR that only prove something relevant was retrieved, not that the generator actually used it correctly. Chunk size and embedding model interact nonlinearly, and re-rankers routi…
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- 2026-09-26 13:16 · DEV Community — AI
RAG Eval Is Broken Because Recall@K Isn't the Metric That Matters