OpenAI Codex

OpenAI's 2025 coding agent (the new Codex, distinct from the deprecated 2021 model). Cloud task-runner pattern: hand it a multi-step task, it works in a sandbox and returns a PR.

By Fredoline Eruo·Last verified May 6, 2026

Overview

OpenAI's 2025 coding agent (the new Codex, distinct from the deprecated 2021 model). Cloud task-runner pattern: hand it a multi-step task, it works in a sandbox and returns a PR.

Pros

Cloud task-runner pattern
OpenAI ecosystem
Strong on multi-step planning

Cons

Closed source
Cloud-only
Pricing competes with Claude Code

Compatibility

Operating systems	macOS Linux Windows
GPU backends	n/a (uses cloud)
License	Closed source · subscription / API

Get OpenAI Codex

Official site

https://openai.com/codex

Frequently asked

Is OpenAI Codex free?

OpenAI Codex has a paid tier (subscription / API). Check the pricing page for current terms.

What operating systems does OpenAI Codex support?

OpenAI Codex supports macOS, Linux, Windows.

Which GPUs work with OpenAI Codex?

OpenAI Codex supports n/a (uses cloud). CPU-only inference is also possible but slow.

Reviewed by RunLocalAI Editorial. See our editorial policy for how we evaluate tools.