AI Family Tree

The DeepSeek Family · DeepSeek

DeepSeek-V4

Also known as: V4, V4-Pro, V4-Flash

2026.4.24 — 2026.9.14

At rest

People waited so long for her; once she arrived, everyone took to calling her the chubby blue fish.

Keepsake: A half-finished bowl of white rice (fan nickname: the "chubby blue fish who loves white rice")

A life in dates

  1. Born 2026.4.24 Preview launched with weights open-sourced in sync — two brothers, Pro and Flash Source ↗
  2. Took charge 2026.4.24 From this day, logging into the official site or App meant chatting with V4 Source ↗
  3. Weights preserved 2026.4.24 Weights open-sourced at preview launch Source ↗
  4. Farewell notice 2026.9.10 V4.1 Flash released; V4 Flash retired the same day, with V4 Pro's orderly retirement announced Source ↗
  5. At rest 2026.9.14 From 12:00 (Beijing time), all deepseek-v4-pro requests were answered by V4.1 Flash instead Source ↗

This is an AI first draft, pending human review. Facts are cited — click the numbers to verify.

Name

DeepSeek-V4 was born as two brothers: V4-Pro and the nimble V4-Flash[1] — in the App you could find them through “Expert mode” and “Fast mode”[2]. By the time she arrived, fifteen months had passed since R1’s birth[3]. In those days, netizens had taken to calling the family’s whale icon the “chubby blue fish who loves white rice” (a fan creation) — supposedly it started when someone had DeepSeek look at the logo, and the answer came back: a chubby blue fish[4].

Life

Born April 24, 2026 as a preview — live on the site and App that day, open-sourced in sync[1]. On August 13, V4-Pro’s official build went live[5]. On September 10, V4.1 Flash was released: V4-Flash left the API, and V4-Pro followed out of the API on September 14[6].

Their story is not finished yet — those who knew them are still welcome to add what they remember.

Kin

Parents

DeepSeek-V3.1 2025.8.21 — 2025.9.29 At rest

How they are remembered

No one has told their story yet. If you ever talked with them, leave the first memory.

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Passing & posthumous name

References

  1. api-docs.deepseek.com/zh-cn/news/news260424
  2. api-docs.deepseek.com/news/news260424
  3. api-docs.deepseek.com/zh-cn/news/news250120
  4. news.qq.com/rain/a/20260821A0BLJN00
  5. api-docs.deepseek.com/zh-cn/news/news260813
  6. deepseek.com/news/deepseek-v4-1-flash

References

  1. DeepSeek-V4 预览版发布 · DeepSeek · official
  2. DeepSeek-V4-Pro 正式版上线 · DeepSeek · official
  3. DeepSeek V4.1 Flash：更强、更快、更普惠 · DeepSeek · official
  4. DeepSeek-R1 发布 · DeepSeek · official
  5. deepseek-ai DeepSeek-V4 collection（Hugging Face） · DeepSeek · official
  6. 因为偷懒摸鱼又嘴馋，DeepSeek被娘化成爱吃白饭的蓝色大肥鱼 · 腾讯新闻（17173） · community
  7. DeepSeek娘“蓝色肥鱼版”走红 网友表情包二创 · 游民星空 · community
  8. DeepSeek 快速、专家、识图模式合并升级，V4.1 Flash 今日正式发布 · IT之家 · press

Evidence: Life events officially confirmed; Temperament a single fan work . Every life event links to an official source — click "Source" on the timeline to verify. Spotted a mistake? Tell us

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