text-embedding-3-large

RAG systems rely on embeddings that fail predictably: when queries use different terms than docs (e.g., ‘overtime’ vs ‘non-employee labor’), contain negations, or depend on exact IDs/codes, retrieval fails. The article argues enterprise reliability comes from upstream filtering (expert keywords, doc structure), not rerankers atop weak retrieval.

The article argues that rerankers—often treated as a ‘magic layer’ in RAG systems—still fail on core semantic challenges like negation, logical complementation, and domain-specific terms, while adding significant latency; experiments show that in some cases, pure embedding retrieval (e.g., text-embedding-3-large) outperforms or matches the ‘embedding + reranker’ combo.