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inf codex routes Codex through https://api.inference.net/v1 using the OpenAI Responses surface. Codex resolves provider credentials through an env var name, so the key lives in $CODEX_HOME/.env, not inline in the config.

Config files

inf writes fields in ~/.codex/config.toml (TOML) and $CODEX_HOME/.env. Both honor CODEX_HOME. inf owns fields in both files, not the whole files.

inf codex on

See Model mapping for supported aliases and limits.

What gets written

TOML owned fields in config.toml: .env owned line:

inf codex status

inf codex off

off restores unchanged owned fields. It keeps fields that you edited after on.

Examples

Select the Fast-tier alias:
Restart Codex after on or off. See Troubleshooting for drift, recovery, and key revocation.