OpenAI Codex
by OpenAI
OpenAI's coding agent across desktop app, CLI, IDE and web
PricingFreemium
Starts at$8/month (Go)
Free tierYes
Platformswindows, macos, web, ios, ide-plugin, api
Models usedGPT-6 family (GPT-6.1 Sol, GPT-6 Luna, GPT-6 Sol)
Best for
ChatGPT subscribers who want a coding agent that runs locally and in the cloud with GitHub and Slack integrations.
Overview
Codex is OpenAI's coding agent, bundled with ChatGPT plans and available as a desktop app, CLI, IDE extension, web app and iOS. Plans run Free, Go ($8), Plus ($20), Pro (from $100), Business and Enterprise, or pay-per-use with an API key.
Strengths and limits
- Included with ChatGPT plans from Free upward
- Available as desktop app, CLI, IDE extension, web and iOS
- Cloud features such as GitHub code review and Slack on Plus and above
- Free and Go tiers are limited to the desktop app and a smaller model
- API-key use lacks cloud features like GitHub review and Slack
What the free plan includes
ChatGPT Free: quick coding tasks with GPT-6 Luna at Standard speed in the Codex desktop app, subject to rollout.