OpenAI Codex
OpenAI's coding agent across the desktop app, CLI, IDE and cloud.
freemium Included in ChatGPT plans, including a limited Free tier; Plus $20/mo, Pro from $100/mo; or API key
Best for: ChatGPT users delegating coding tasks locally or in the cloud
Visit OpenAI Codex ↗ https://openai.com/codex/Pricing verified Oct 22, 2026 against the official source.