DeepSeek researcher: V4.1 Flash builds on YOCO as architecture innovation enters 'second half'

donglixp · x · 2026-09-11

DeepSeek researcher donglixp said DeepSeek V4.1 Flash embraces YOCO (You Only Cache Once) as the soul of its architecture, inheriting YOCO's order-of-magnitude advantages in prefill and KV caching. He argues architecture innovation is entering a second half: from component innovation to layout innovation, like YOCO's logical separation of prefill and decoding.

Related event: Inside DeepSeek V4.1 Flash: YOCO at its core and KV cache reuse(7 posts)→

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