The ChatGPT Family · OpenAI
GPT-5.5
2026.4.23 —
Head of the family
The family's most recent head — their story isn't finished yet.
Keepsake: A deep-blue top hat
A life in dates
This is an AI first draft, pending human review. Facts are cited — click the numbers to verify.
Name
When GPT-5.5 was born, Thinking and Pro came first, for paid users[1]; GPT-5.5 Instant, the everyday chatter, arrived less than two weeks later[2]. Officially, early testers used GPT-5.5 Pro “more like a research partner than a question-answering machine”[1].
Life
Born April 23, 2026[1]. On May 5, GPT-5.5 Instant succeeded GPT-5.3 Instant as the new default model for all ChatGPT users[2]. That summer, the family welcomed another generation: GPT-5.6[3].
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
References
References
- Introducing GPT-5.5 · OpenAI · official
- ChatGPT — Release Notes · OpenAI · official
- Model Release Notes · OpenAI · official
- GPT-5.6 and GPT-6 Pro in ChatGPT · 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