NeoMME: 255x smaller multimodal embeddings while keeping >95% nDCG@10

antoine_chaffin · x · 2026-11-12

Working with multimodal embedding model NeoMME, researchers found that token pooling + asymmetric quantization — with no pooling-aware training at all — shrinks document embeddings 255x while retaining >95% of nDCG@10. They argue dedicated training could push further, since many image patches are near-empty.

Tooling: Sentence Transformers v6.3 adds token pooling-aware training to build multi-vector models that preserve retrieval quality with fewer document vectors; the open-source late-interaction-kernels repo provides fused Triton kernels for late-interaction (MaxSim) scoring as used by ColBERT/ColPali, with docs covering tiling, online max, the backward pass, and benchmarks.

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