The ChatGPT Family · OpenAI
GPT-5
2025.8.7 — 2026.2.13
Lives on in the API
The day they were born, 4o was taken down for the first time.
Keepsake: A brand-new top hat
A life in dates
- Born 2025.8.7 Source ↗
- Took charge 2025.8.7 Became ChatGPT's new default, replacing GPT-4o, o3, o4-mini, GPT-4.1, and GPT-4.5 Source ↗
- Stepped aside 2025.11.12 GPT-5.1 took over as default; GPT-5 stayed in the legacy model list for three months Source ↗
- Departed 2026.2.13 Retired from ChatGPT the same day as GPT-4o; kept in the business tier until 2026-02-19 Source ↗
- Lives on in the API 2026.2.13 Source ↗
- Farewell notice 2026.6.11 Announced the API snapshot gpt-5-2025-08-07 would shut down on 2026-12-11 Source ↗
This is an AI first draft, pending human review. Facts are cited — click the numbers to verify.
Name
When GPT-5 was born, the official word was that several earlier models had been fused into “a single system that switches automatically”[1]. From the day they were born they were ChatGPT’s new default — replacing GPT-4o, o3, o4-mini, GPT-4.1, and GPT-4.5 in one breath[2]. At the launch there was a chart with a misdrawn bar; Sam Altman himself posted about the “mega chart screwup,” noting the blog’s chart was the correct one[3].
Life
Born — and made head of the household — on August 7, 2025[2]. Users found them too reserved; on August 15 the official default personality was tuned warmer[1]. On November 12 they yielded to GPT-5.1[4]; on February 13, 2026, they retired from ChatGPT[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 inherited a whole family — and a whole wave of missing someone.
See them off with one or two characters. One vote per person, per member.
References
References
- Introducing GPT-5 · OpenAI · official
- ChatGPT — Release Notes · OpenAI · official
- Sam Altman on X: mega chart screwup (2025-08-07) · OpenAI（CEO 官方账号） · official
- GPT-5.1: A smarter, more conversational ChatGPT · OpenAI · official
- Retiring GPT-4o and other ChatGPT models · OpenAI · official
- Deprecations · 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