Codex

Codex uses the Responses API under /v1. Put this in $CODEX_HOME/config.toml (by default ~/.codex/config.toml). $LLMAO_KEY is the personal access token from My Keys. The model id comes from the Models page. This example uses qwen3.8-27b.

model_provider = "llmao"
model = "qwen3.8-27b"

[model_providers.llmao]
name = "llmao"
base_url = "https://llm.apache.org/v1"
env_key = "LLMAO_KEY"
wire_api = "responses"

export LLMAO_KEY=<your personal access token>
codex

codex -m qwen3.8-27b selects the model for one run. wire_api stays responses.