Codex verified
GPT-5.5 leaves Codex ChatGPT sign-in
Data as of · Last verified against vendor · Page updated
On 15 Oct 2026, OpenAI: GPT-5.5 retired from Codex ChatGPT sign-in.
PlanYield, 'GPT-5.5 leaves Codex ChatGPT sign-in', updated 22 Oct 2026, https://planyield.dev/changes/2026-10-15-gpt-55-retired-codex/
What the source says
GPT-5.5 retired from Codex ChatGPT sign-in Status recorded in the seed: verified.
Source: learn.chatgpt.com. (14 Oct 12:00 PDT = 15 Oct 03:00 SGT)
Plans this touches
ChatGPT Free · ChatGPT Go · ChatGPT Plus · ChatGPT Pro · ChatGPT Business
Current limits: Codex usage limits
Other OpenAI changes
22 Oct 2026 Codex Day 17 is a usage reset, the eighth of the program · 21 Oct 2026 Codex keeps prompt cache indefinitely; API adds 12h caching · 21 Oct 2026 OpenAI fixes Codex accounts metered against the wrong plan · 6 Oct 2026 Approve for me auto-review no longer counts against Codex usage
Get the Monday diff when the next change lands. All changes