Codex CLI

Codex CLI uses the OpenAI API. Point it at the OpenAI-compatible gateway.

Quick Start

This guide helps you get Codex CLI running through the gateway in a few minutes.

Step 1: Install Codex CLI

Follow the Codex CLI installation guide to install the CLI on your system.

Step 2: Configure Codex

Codex uses a config.toml file, usually at ~/.codex/config.toml. Create or edit it with the following:

model_provider = "llmpool"
model_reasoning_effort = "high"
model="~openai/gpt-latest"

[model_providers.llmpool]
name = "llmpool"

base_url="https://api.benpay.ai/openai/v1"
env_key="LLMPOOL_API_KEY"

Step 3: Set your API key

# Add to ~/.zshrc, ~/.bashrc, or ~/.config/fish/config.fish
export LLMPOOL_API_KEY="..."

Step 4: Start coding

cd /path/to/your/project
codex

Step 5: Verify

Run /status in Codex CLI to confirm your connection.

> /status
Model provider: llmpool - ...