New attention design called inference-informed: cheap prefill, small KV cache
stochasticchasm · x · 2026-09-11
An analyst assesses a newly revealed attention architecture as 'very inference-informed': cheap prefill, small KV cache, likely friendly for PD disaggregation, with good utilization under larger-batch prefill.
In a follow-up he notes the design resembles hysparse, NSA, and DeepSeek's own CSA/HCA from v4 — combining a local sliding-window branch with a sparse retrieval branch is solidifying as a broad industry pattern.
Related event: Leaked DeepSeek V4.1 Flash Tech Report Reveals KV Cache-Obsessed Flagship(44 posts)→
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