Codex CLI Quick Start

OpenAI's code generation tool based on GPT. Configurable reasoning depth.

Step 1: Install

Node 18+ required:

npm install -g @openai/codex
codex --version

Step 2: Config API

Using CC Switch (Recommended)

1. Open CC Switch → Add Config → Framework: Codex
2. Base URL: https://ai.kektoken.com/v1 ← note /v1 suffix
3. Enter API Key (use GPT group key: vip2 / vip2_pro)
4. Model: gpt-5.5 recommended
5. Click Add → restart terminal

Manual Config

config.toml (~/.codex/config.toml)

model_provider = "kek"
model = "gpt-5.5"
model_reasoning_effort = "high"

[model_providers.kek]
name = "kek"
base_url = "https://ai.kektoken.com/v1"
wire_api = "responses"
requires_openai_auth = true

auth.json (~/.codex/auth.json)

{ "OPENAI_API_KEY": "sk-your-key" }

Step 3: Launch

codex

Reasoning Effort

Setting	Speed	Use Case
low	Fast	Simple code gen
medium	Medium	Daily tasks (recommended)
high	Slow	Complex algorithms

Models

Model	Notes
gpt-5.5	Recommended, strongest
gpt-5.4	Balanced
gpt-5.3-codex	Code-specific