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Coding & app buildersFree tier with limits

OpenAI Codex

OpenAI's coding agent, included in ChatGPT plans.

Official site: developers.openai.com ↗

Is it actually free? Free tier with limits

Included in ChatGPT Free for quick coding tasks in the desktop app (subject to rollout); usage limits apply.

Pricing

Included with ChatGPT Free, Go ($8/month), Plus ($20/month), Pro and business plans.

Best for

ChatGPT users who want a coding agent without another subscription.

Not great for

Heavy coding on the Free plan.

Real plays that use OpenAI Codex

Alternatives

Coding & app buildersPaid

Claude Code

Anthropic's coding agent for the terminal, IDE and desktop.

Free? Not included on Claude's Free plan; it comes with Pro and Max.

Coding & app buildersFree tier with limits

Cursor

An AI code editor with agents that write and edit code.

Free? Free ($0/month): limited agent and chat requests.

Coding & app buildersFree tier with limits

GitHub Copilot

GitHub's AI coding assistant in editors, the CLI and on GitHub.

Free? Free ($0): limited chat and agent usage; supports CLI and agent mode.

Last checked 2026-10-13 · Source: developers.openai.com pricing ↗ · How we verify · Report an error