Lesson 3.2
Reranking retrieved candidates
Retrieve broadly, then rerank precisely. A reranker reads query and passage together, which is why it beats vector distance on ordering.
5mAdvanced5,828 students
Sign in to watch this lesson
Browsing is free. Create an account to play videos and track your progress.
Overview
Retrieve broadly, then rerank precisely. A reranker reads query and passage together, which is why it beats vector distance on ordering.
What this lesson covers
- Retrieve a wide candidate set, then narrow it
- Score query and passage jointly with a reranker
- Balance the latency cost against the accuracy gain
This lesson sits in Retrieval Quality, part of Retrieval-Augmented Generation from Scratch. It assumes what came before it and leads directly into the next lesson in the module.
In this lesson you will:
- Retrieve a wide candidate set, then narrow it
- Score query and passage jointly with a reranker
- Balance the latency cost against the accuracy gain