Softpick: No Attention Sink, No Massive Activations with Rectified Softmax

Zayd Muhammad Kawakibi Zuhri, Erland Hilman Fuadi, Alham Fikri Aji


Abstract
We introduce softpick, a rectified, not sum-to-one, drop-in replacement for softmax in transformer attention mechanisms that eliminates attention sink and massive activations. Our experiments with 340M and 1.8B parameter models demonstrate that softpick achieves 0% sink rate consistently. The softpick transformers produce hidden states with significantly lower kurtosis and creates sparse attention maps. Quantized models using softpick outperform softmax on standard benchmarks, with a particularly pronounced advantage at lower bit precisions. Our analysis and discussion shows how softpick has the potential to open new possibilities for quantization, low-precision training, sparsity optimization, pruning, and interpretability. Our code: https://github.com/zaydzuhri/softpick-attention.
Anthology ID:
2026.findings-acl.905
Volume:
Findings of the Association for Computational Linguistics: ACL 2026
Month:
July
Year:
2026
Address:
San Diego, California, United States
Editors:
Maria Liakata, Viviane P. Moreira, Jiajun Zhang, David Jurgens
Venue:
Findings
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Publisher:
Association for Computational Linguistics
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Pages:
18179–18213
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URL:
https://preview.aclanthology.org/ingest-acl-workshops/2026.findings-acl.905/
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Bibkey:
Cite (ACL):
Zayd Muhammad Kawakibi Zuhri, Erland Hilman Fuadi, and Alham Fikri Aji. 2026. Softpick: No Attention Sink, No Massive Activations with Rectified Softmax. In Findings of the Association for Computational Linguistics: ACL 2026, pages 18179–18213, San Diego, California, United States. Association for Computational Linguistics.
Cite (Informal):
Softpick: No Attention Sink, No Massive Activations with Rectified Softmax (Zuhri et al., Findings 2026)
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https://preview.aclanthology.org/ingest-acl-workshops/2026.findings-acl.905.pdf
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