---
format: "aidr-story-markdown/v1"
id: "082d78251ef8204c1763904b0ccfcf1a17a13a70c5e8df2cbe335ab314fac671"
canonical_url: "https://aidr.today/082d7825?lang=en"
title: "DeepSeek-v4.1 Flash: Pushing the Limits of KV Cache Compression"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-09-17T01:39:47.000Z"
category: "Models"
topics: ["anthropic","claude","multi-agent","open-source"]
source_urls: ["https://zartbot.github.io/blog/model_arch/dsv41flash_arch/en.html","https://news.ycombinator.com/item?id=49735410"]
summary: "A deep dive into the DeepSeek-V4.1 Flash technical report: CED, CSA2, HSI, Single-Pass mHC, Engram and FP4 KV Cache — how the KV cache was compressed to just 890 bytes per token."
---

# DeepSeek\-v4\.1 Flash: Pushing the Limits of KV Cache Compression

> [Open the canonical story](<https://aidr.today/082d7825?lang=en>)

**Published:** 2026-09-17T01:39:47.000Z
**Category:** Models
**Topics:** anthropic, claude, multi\-agent, open\-source

## Summary

A deep dive into the DeepSeek\-V4\.1 Flash technical report: CED, CSA2, HSI, Single\-Pass mHC, Engram and FP4 KV Cache — how the KV cache was compressed to just 890 bytes per token\.

## Sources

- [Story source](<https://zartbot.github.io/blog/model_arch/dsv41flash_arch/en.html>)
- [Discussion](<https://news.ycombinator.com/item?id=49735410>)