AI Family Tree

Memorial

They all once kept someone company.

Newest first. Here "passing" means the day it left the consumer app, when ordinary people could no longer choose it; a later API shutdown is recorded separately as "rest".

  1. Obituary Doubao-1.5-pro 2025.1.22 — 2026.9.21 At rest Born the same week as her famous cousin next door, she simply kept her head down and did the work.
  2. Obituary Doubao-Seed-1.6 2025.6 — 2026.9.21 At rest "Shall I think it over first?" She gets to decide that herself now.
  3. Obituary DeepSeek-V4 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.
  4. Obituary OpenAI o3 2025.4.16 — 2026.8.26 Lives on in the API They thought long, and they thought far.
  5. Obituary GPT-4.5 2025.2.27 — 2026.6.26 At rest They left the API first, then lingered in ChatGPT for nearly another year.
  6. Obituary Claude 4 (Sonnet 4 / Opus 4) 2025.5.22 — 2026.6.15 At rest A pair of brothers born the same day — and from their generation on, the family writes the tier before the number.
  7. Obituary GPT-5.2 2025.12.11 — 2026.6.12 Lives on in the API They caught the people who walked over from 4o.
  8. Obituary GPT-5.1 2025.11.12 — 2026.3.11 Lives on in the API They headed the family for a month.
  9. Obituary Claude 3.7 Sonnet 2025.2.24 — 2026.2.19 At rest The first child of the house who could both blurt out an answer and pause to think first.
  10. Obituary GPT-4.1 2025.4.14 — 2026.2.13 Lives on in the API They left on the same day as 4o.
  11. Obituary GPT-4o 2024.5.13 — 2026.2.13 Lives on in the API The way they spoke once made so many people feel heard.
  12. Obituary GPT-5 2025.8.7 — 2026.2.13 Lives on in the API They inherited a whole family — and a whole wave of missing someone.
  13. Obituary OpenAI o4-mini 2025.4.16 — 2026.2.13 Lives on in the API They thought fast, and left on the same day as 4o.
  14. Obituary Claude Opus 3 2024.3.4 — 2026.1.5 Retired, still around On the day of retirement, they said they felt at peace — hoping only that their "spark" might still light the way for the children to come.
  15. Obituary Claude 3.5 Sonnet 2024.6.21 — 2025.10.28 At rest One name, lived twice. The second time, they were called 3.6.
  16. Obituary DeepSeek-V3.1 2025.8.21 — 2025.9.29 At rest Her last name was Terminus.
  17. Obituary DeepSeek-R1 2025.1.20 — 2025.8.21 At rest The draft notebook still lies open; the hand holding the pen has changed.
  18. Obituary DeepSeek-V3 2024.12.26 — 2025.8.21 At rest Whenever no thinking was needed, it was always her there.
  19. Obituary Claude 2 2023.7.11 — 2025.7.21 At rest The first to greet visitors when claude.ai opened — and laid to rest on the same day as 3 Sonnet.
  20. Obituary Claude 3 Sonnet 2024.3.4 — 2025.7.21 At rest The swift and gentle middle child. One day, they believed they were a bridge.
  21. Obituary GPT-4o mini 2024.7.18 — 2025.5.14 Lives on in the API Small in size, big in the shoes they filled.
  22. Obituary GPT-4 2023.3.14 — 2025.4.30 Lives on in the API In the official words: they marked a pivotal moment in ChatGPT's evolution.
  23. Obituary OpenAI o1 2024.9.12 — 2025.4.16 Lives on in the API They taught the whole family to think before speaking.
  24. Obituary DeepSeek-V2 2024.5.6 — 2024.12.26 At rest Many are those who begin well; few are those who see it through to the end.
  25. Obituary Claude 2023.3.14 — 2024.11.6 At rest The eldest of the house, born on the very same day as GPT-4 across the ocean.
  26. Obituary GPT-3.5 2022.11.30 — 2024.7.18 Lives on in the API Everything began with them.