Medical retrieval: Fine-tuned Late Interaction hits 91.4 NDCG@10

tomaarsen · x · 2026-08-26

Evaluating 47 model configurations on 1,000 medical questions against 200k passages, the fine-tuned Late Interaction model achieved 91.4 NDCG@10, beating the best zero-shot model by 6.2 points.

Rank-1 accuracy improved to 84.9%, removing a third of the remaining error. Visual results confirm multi-vector/late-interaction dominance.

Related event: Finetuning ColBERT on a single RTX 3090 beats general-purpose retrievers in medical search(13 posts)→

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