Data & retrieval
Reranking
Reordering retrieved results using a more precise relevance model.
Definition
Reranking takes an initial candidate set and applies a stronger model or scoring rule to improve the final evidence order.
Why it matters
It can materially improve RAG quality, but introduces another model, latency step and component requiring evaluation.
Related concepts
- Semantic search
Search based on meaning rather than only matching exact words.
- System under test
The complete configuration being evaluated—not only the model.
- Retrieval-augmented generation
Generating answers using information retrieved at request time.