[6/21 21:00] Subquadratic SubQ sparse attention LLM bottleneck breakthrough

AI News Flash for June 21, 2026 at 21:00 UTC. Topics: 1. Subquadratic SubQ sparse attention LLM bottleneck breakthrough https://www.technologyreview.com/2026/06/19/1139313/a-startup-claims-it-broke-through-a-bottleneck-thats-holding-back-llms/

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[6/21 21:00] Subquadratic SubQ sparse attention LLM bottleneck breakthrough

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