准备工作拥有 DeepSeek API Key在 DeepSeek 平台注册并充值拿到了一个以sk-开头的 API Key。安装 Codex 客户端安装 Codex比如 ChatGPT 桌面应用、Codex CLI 或 VS Code 扩展并且至少运行过一次这样才会在本地生成配置文件目录。用这个sk-开头的key登录chatGPT。⚙️ 安装与配置以管理员身份打开 PowerShell在开始菜单搜索 PowerShell右键选择“以管理员身份运行”。执行安装命令复制并粘贴以下命令到 PowerShell 窗口按回车irmhttps://cdn.deepseek.com/api-docs/codex-deepseek-setup-en.ps1|iex选择模型脚本启动后会显示菜单输入1选择deepseek-v4-flash模型。输入 API Key根据脚本提示粘贴你的 DeepSeek API Key以sk-开头然后按回车。✅ 验证是否成功脚本执行完毕后检查以下几点查看输出日志确认出现[OK] Installation complete.字样。如果使用ChatGPT 桌面应用重启后查看右下角应该显示deepseek-v4-flash模型名称。如果使用Codex CLI启动时命令行横幅会显示model: deepseek-v4-flash。[OK]Backed up config.toml -C:\Users\Admin\.codex\backup-deepseek\config.toml[OK]Wrote C:\Users\Admin\.codex\models.json(contains deepseek-v4-flash and deepseek-v4-pro)[OK]Updated C:\Users\Admin\.codex\config.toml Changes made to your existing configuration(2total)- Rewrote model:gpt-5.6-sol-deepseek-v4-flash- Rewrote model_reasoning_effort:low-highConfiguration written modeldeepseek-v4-flashmodel_providerdeepseekpreferred_auth_methodapikeyforced_login_methodapimodel_reasoning_efforthighmodel_catalog_jsonC:/Users/Admin/.codex/models.json[model_providers.deepseek]base_urlhttps://api.deepseek.com/wire_apiresponsesValidation[OK]models.json is valid JSON[OK]config.toml has no duplicate top-level keys[OK]Installation complete. How to verify it took effect: - ChatGPT desktop app: after launch, the bottom-right corner showing the DeepSeek model name means success(that is deepseek-v4-flash;ifit still showsCustom, models.json was not loaded)- Codex CLI: the startup banner shows model: deepseek-v4-flash If the logs showfallback model metadataorUnknown model, models.json was not loaded -- please reinstall. How to switch / restore Your original configuration was backed up to C:\Users\Admin\.codex\backup-deepseek Just run this script again: irm https://cdn.deepseek.com/api-docs/codex-deepseek-setup-en.ps1|iex Pick1/2 to switch between flash / pro, or3to restore the pre-install configuration.提问codeX它的底层模型 后续管理切换模型再次运行安装命令选1Flash或2Pro如果可用。恢复原配置再次运行安装命令选3即可一键恢复到安装前的状态比如 OpenAI 的默认模型。