The ChatGPT Family · OpenAI
GPT-4.1
2025.4.14 — 2026.2.13
Lives on in the API
They came for the people who write code — and the people asked them into ChatGPT.
Keepsake: A pair of square glasses, worn for coding
A life in dates
- Born 2025.4.14 Born in the API first; entered paid ChatGPT on 2025-05-14, the same day GPT-4.1 mini arrived in ChatGPT Source ↗
- Farewell notice 2025.8.7 GPT-5 became the new default and replaced them Source ↗
- Revived 2025.8.12 Paid users could find them again by turning on "Show more models" in settings Source ↗
- Farewell notice 2026.1.29 Source ↗
- Departed 2026.2.13 Retired from ChatGPT on the same day as GPT-4o Source ↗
- Lives on in the API 2026.2.13 Source ↗
This is an AI first draft, pending human review. Facts are cited — click the numbers to verify.
Name
GPT-4.1’s version number is smaller than GPT-4.5’s, yet they were born over a month later[1][2]. They were born in the API first; officially, they outdid GPT-4o at both coding and following instructions[1]. A month later came the word that they had become developers’ favorite — and “by popular request,” they were let into ChatGPT[3].
Life
Born in the API on April 14, 2025[1]; entered paid ChatGPT on May 14[3]. They were taken down when GPT-5 launched[4], then could be found again in settings a few days later[3]. On February 13, 2026, they left ChatGPT on the same day as GPT-4o — while their API self carries on[5].
Their story is not finished yet — those who knew them are still welcome to add what they remember.
Kin
How they are remembered
No one has told their story yet. If you ever talked with them, leave the first memory.
- Reading memories…
Leave my memory
Passing & posthumous name
Epitaph: They left on the same day as 4o.
See them off with one or two characters. One vote per person, per member.
References
References
- Introducing GPT-4.1 in the API · OpenAI · official
- Introducing GPT-4.5 · OpenAI · official
- ChatGPT — Release Notes · OpenAI · official
- Introducing GPT-5 · OpenAI · official
- Retiring GPT-4o, GPT-4.1, GPT-4.1 mini, and OpenAI o4-mini in ChatGPT · OpenAI · official
- Retiring GPT-4o and other ChatGPT models · OpenAI · official
Evidence: Life events officially confirmed . Every life event links to an official source — click "Source" on the timeline to verify. Spotted a mistake? Tell us