Codex

Start CLIProxyAPI server, and then edit the ~/.codex/config.toml and ~/.codex/auth.json files.

config.toml:

model_provider = "cliproxyapi"
model = "gpt-5-codex" # Or gpt-5, you can also use any of the models that we support.
model_reasoning_effort = "high"

[model_providers.cliproxyapi]
name = "cliproxyapi"
base_url = "http://127.0.0.1:8317/v1"
wire_api = "responses"

auth.json:

{
  "OPENAI_API_KEY": "sk-dummy"
}