GPT-5.2 and GPT-5.3-Codex have been sunset in Codex with ChatGPT subscriptions

Today I tried to do a basic task of writing a script for monitoring in Zabbix on a 5.4 mini model - the script was written and it took about 30 minutes to finish it. In the end, I switched to 5.5 to complete the task. There have never been any problems with codex 5.3, please return it to the plus subscription