STE regularization compresses ColBERT 5x with 99.4% retrieval retention

antoine_chaffin · x · 2026-11-11

Antoine Chaffin points to a new Hugging Face article building on hierarchical pooling (which already halves ColBERT storage without hurting retrieval): applying the same STE-based regularization used to fix MUVERA/SMVE pushes this to 5x compression with 99.4% retention, without degrading full-token performance. Key insight: the best way to achieve compressability is to train for it directly. The piece covers matching budget to objective, adaptive per-document budgets, and releases LateOn-hpool-regularized and related models. He also notes MTRL's value for multi-vector models and argues embedding dimensions are still too large.

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