Weaviate Podcast #150: ZeroEntropy co-founder explains zELO and zerank-2 reranker
CShorten30 · x · 2026-11-09
The 150th Weaviate Podcast features Ghita Houir Alami, co-founder of ZeroEntropy who now leads model research at Notion, in a deep dive on search and reranking.
Key topic: ZeroEntropy's zELO method converts sparse pairwise document preferences into absolute pointwise scores — like chess Elo, a small sample of pairwise battles fitted through a Thurstone model — then distills that signal into a pointwise reranker, producing the state-of-the-art zerank-2 cross-encoder.
Related event: Weaviate Podcast 150: ZeroEntropy Co-founder on Elo-based Reranking(2 posts)→
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