codex最近更新版本后使用中转的全部都无法动态切换模型 
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后面研究了一下加一个参数就OK了 
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把~/.codex/config.toml文件的中转配置改为如下: 
model_provider = "packycode"
model = "gpt-5"
model_reasoning_effort = "medium"
disable_response_storage = true

[model_providers.packycode]
name = "packycode"
base_url = "https://codex-api.packycode.com/v1"
wire_api = "responses"
requires_openai_auth = true

主要就是在最后添加的这一句requires_openai_auth = tr...