~/.codex/config.toml(如果当前用户目录下没有 .codex 目录,先创建一个),将以下配置添加到配置文件中:[model_providers.grok]
name = "Grok Chat Completions API"
base_url = "https://llm-api.mmchat.xyz/v1"
env_key = "METACHAT_API_KEY"
wire_api = "chat"
requires_openai_auth = false
request_max_retries = 4
stream_max_retries = 10
stream_idle_timeout_ms = 300000
[profiles.grokcode]
model = "grok-code-fast-1"
model_provider = "grok"
[profiles.grok41]
model = "grok-4-1-fast-reasoning"
model_provider = "grok"
[profiles.grok420]
model = "grok-4.20-beta-0309-reasoning"
model_provider = "grok"
METACHAT_API_KEY 为环境变量,变量值配置为 MetaChat API Key。codex --profile grok420 启动 Codex,指定使用配置的 Grok 4.20 模型,可以正常使用 Codex 进行开发。