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A startup claims it broke through a bottleneck that’s holding back LLMs

technologyreview.com·Jun 19, 2026

Miami-based AI startup Subquadratic claims to have solved a longstanding mathematical bottleneck in large language models (LLMs) with its new model, SubQ, which reportedly offers significant improvements in speed, cost, and energy efficiency. While initial skepticism surrounded its claims, recent independent evaluations suggest that SubQ may indeed rival leading models in performance, particularly for data-intensive tasks, although broader public testing is still needed to fully validate its capabilities.

Subquadratic's development of the SubQ model, which utilizes sparse attention instead of dense attention, presents a significant advancement in the efficiency of large language models (LLMs). As a professional interested in AI infrastructure and model training, this breakthrough could drastically reduce the computational costs and energy consumption associated with LLMs, providing a competitive edge in processing large datasets. Monitoring SubQ's performance and adoption could offer insights into future AI development trends and potential investment opportunities in AI startups focused on efficiency improvements.

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