GPT-5.5 Appears in OpenAI Codex Selector but Returns 400 Error, Currently Unavailable

Gate News message, April 22 — GPT-5.5 has appeared in the model selector dropdown for OpenAI Codex, positioned at the top of the list.

However, when users select GPT-5.5 and submit a request, Codex returns a 400 error with the message "The 'gpt-5.5' model is not supported when using Codex with a ChatGPT account." The model is currently unavailable. OpenAI has not released any official announcement or documentation regarding GPT-5.5 as of now.

Disclaimer: The information on this page may come from third-party sources and is for reference only. It does not represent the views or opinions of Gate and does not constitute any financial, investment, or legal advice. Virtual asset trading involves high risk. Please do not rely solely on the information on this page when making decisions. For details, see the Disclaimer.
Comment
0/400
No comments