mcp codex连不上的情况

有时会出现codex返回400错误代码的情况，然后一路从5.4降到4o，最后不显示模型了，那最后用的什么模型呢？   >  Error: {"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-5.4-xhigh' model is not supported when using Codex with > a ChatGPT account."}} > Error: {"type":"error","status":400,"error":{"type":"invalid_request_error","message":"The 'gpt-4o' model is not supported when using Codex with a > ChatGPT account."}} 因为tz的问题吗？有大佬遇到过类似情况么。