OpenAI Codex
AI coding assistant
Best for: Developers already paying for ChatGPT
OpenAI's coding agent for the terminal, IDE, desktop app and cloud, included with ChatGPT plans.
Free plan
From $8/mo billed monthly · free plan
Checked 18 Oct 2026 · source (OpenAI Codex pricing source, opens in a new tab)
All plans
Free plan; Go $8/mo; Plus $20/mo; Pro from $100/mo