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GPT 5.1 Family - Related AI Models | Phaseo

All model families

GPT 5.1

Models: 5
Release span: Nov 2025

Family members

Newest to oldest

01
GPT 5.1 Codex Max
OpenAI
Nov 19, 2025
retired
02
GPT 5.1 Codex
OpenAI
Nov 13, 2025
retired
03
GPT 5.1 Chat
OpenAI
Nov 13, 2025
retired
04
GPT 5.1 Codex Mini
OpenAI
Nov 13, 2025
retired
05
GPT 5.1
OpenAI
Nov 12, 2025
active