Introducing the Ettin Reranker Family

Introducing the Ettin Reranker Family Introducing the Ettin Reranker Family Published May 19, 2026 Update on GitHub Upvote 58 Tom Aarsen tomaarsen TL;DR Today I'm releasing six new Sentence Transformers CrossEncoder rerankers, state-of-the-art at their respective sizes, built on top of the Ettin ModernBERT encoders, together with the data and full training recipe that produced them: cross-encoder/ettin-reranker-17m-v1 cross-encoder/ettin-reranker-32m-v1 cross-encoder/ettin-reranker-68m-v1 cross-encoder/ettin-reranker-150m-v1 cross-encoder/ettin-reranker-400m-v1 cross-encoder/ettin-reranker-1b-v1 The models were trained with a distillation recipe : pointwise MSE on mixedbread-ai/mxbai-rerank-large-v2 scores over cross-encoder/ettin-reranker-v1-data , which is a subset of lightonai/embeddings-pre-training mixed with a reranked subset of lightonai/embeddings-fine-tuning . Our six rerankers paired with google/embeddinggemma-300m on MTEB(eng, v2) Retrieval.

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• Introducing the Ettin Reranker Family Published May 19, 2026 Update on GitHub Upvote 58 Tom Aarsen tomaarsen TL;DR Today I'm releasing six new Sentence Transformers CrossEncoder rerankers, state-of-the-art at their respective sizes, built on top of the Ettin ModernBERT encoders, together with the data and full training recipe that produced them: cross-encoder/ettin-reranker-17m-v1 cross-encoder/ettin-reranker-32m-v1 cross-encoder/ettin-reranker-68m-v1 cross-encoder/ettin-reranker-150m-v1 cross-encoder/ettin-reranker-400m-v1 cross-encoder/ettin-reranker-1b-v1 The models were trained with a distillation recipe : pointwise MSE on mixedbread-ai/mxbai-rerank-large-v2 scores over cross-encoder/ettin-reranker-v1-data , which is a subset of lightonai/embeddings-pre-training mixed with a reranked subset of lightonai/embeddings-fine-tuning .
• Our six rerankers paired with google/embeddinggemma-300m on MTEB(eng, v2) Retrieval.
• See Results for five more embedder pairings.
• If you're new to rerankers and want the "why" first, jump to What is a reranker, and why pair one with an embedder?
• If you just want to plug a model in, jump to Usage .
• If you want to train your own, jump to Training .