Link to bluesky https://bsky.app/profile/tomaarsen.com/post/3llc2jvwah22f
Some more details https://huggingface.co/blog/train-reranker
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I want to clarify something. Reranker is a general term that can refer to any model used for reranking. It is independent of implementation.
What you refer to
Is a specific implementation known as CrossEncoder that is common for reranking models but not retrieval ones for the reasons you described. But you can also use any other architecture
Thanks, I think this is a good clarification, I had not encountered rerankers outside this specific implementation.