Cannot use GPT-5.3-Codex on Codex Cloud

Hello, I have been trying for the last 3 days to access the new model, GPT-5.3-Codex, on Codex Cloud. The following screenshot shows the defalt model is stuck on GPT-5.2-Codex. Either that, or its just a system prompt error. In any case, I would be thankful if you could fix this.