ChatGPT · Continue · US ChatGPT paid users · US
GPT-4.5 retired from ChatGPT
GPT-4.5 is gone from ChatGPT; its chats now continue with GPT-5.5
Was Availablenow Retired
What this means for you
Paid users who still picked GPT-4.5 in model settings can no longer use it; old chats move to GPT-5.5.
Evidence
ChatGPT's release notes (May 28, 2026) announced GPT-4.5 would be retired on June 26, 2026 after a 30-day sunset; the June 26 entry says 'GPT-4.5 is no longer available in ChatGPT, including for custom GPTs', and existing chats continue with GPT-5.5.
- GPT-4.5 in ChatGPT
- Was Available to paid users via model settingsRetired (chats continue with GPT-5.5)
Sources
- ChatGPT release notes (announcement, May 28 2026) · archived
- ChatGPT release notes (retirement confirmed, Jun 27 2026) · archived
Effective Jun 26, 2026 · First recorded May 28, 2026 · Reconstructed · High confidence