Connect Codex
Use your Inference Cheap key in Codex CLI or the app.
Configure Codex
Paste this block at the start of ~/.codex/config.toml (or
$CODEX_HOME/config.toml), before any [section], and replace YOUR_API_KEY
with your key. If the file already has inference_cheap settings, replace them
instead of adding a second copy.
# <inference_cheap>
model_providers.inference_cheap.experimental_bearer_token = "YOUR_API_KEY"
model_providers.inference_cheap.name = "OpenAI"
model_providers.inference_cheap.base_url = "https://codex.inference.cheap"
model_providers.inference_cheap.wire_api = "responses"
model_providers.inference_cheap.supports_websockets = false
model_provider = "inference_cheap" # Set to "openai" to connect to OpenAI directly.
# </inference_cheap>Start a task
Restart Codex and start a new chat. Existing chats keep their old provider; fork one to continue it through Inference Cheap.
Troubleshooting
- Config error: remove duplicate keys and put the block before any section.
- Auth error: check your key.
- Codex still uses another provider: check profile and project overrides.