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

5.5 low blows up credits. Did very simple question to test, 20% gone from the 5h. What model is best to use now? Tried 5.4 - mini, but it made so many mistakes. I understand making room for other models, but they should at least be better.