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2026-09-22

DeepSeek V4.1 Flash Cuts KV Cache per Token to 890 Bytes, 437x Smaller Than V1

DeepSeek V4.1 Flash Cuts KV Cache per Token to 890 Bytes, 437x Smaller Than V1

Key points

DeepSeek KV cache per token by generation (bytes) | Down from 389,120 in V1 to 890 in V4.1, a 437x efficiency gain

Image source: @Jadzo1_