Configuration files
Edit
config.toml and auth.json in this directory, creating them if they do not exist. If CODEX_HOME is set, use that directory instead.
gpt-6-astra. Save the files, restart Codex, and test in a new conversation.
Codex uses the Responses protocol, so the gateway must support
/v1/responses. Models or channels that only support Chat Completions may not work with Codex. Do not commit auth.json to a repository: it contains your API key.