Author: Mitesh
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Why your RAG accuracy plateaus at 70% — and the four-tier retrieval architecture that breaks past it
The default vector-search-plus-LLM design is a great prototype and a poor production system. After shipping production RAG across legal, healthcare, and financial-services corpora, the pattern that consistently clears 90%+ answer accuracy at sub-second latency is not a bigger model — it is four retrieval tiers working together.