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#2 of the day · Sunday, 16 August 2026 ·Today’s edition →

Agent

Codex

Agent

OpenAI’s coding agent for the terminal and the cloud.

Codex CLI works in a local checkout. Cloud tasks run in a sandbox. Same model family as ChatGPT, pointed at a repo.

latest·Proprietary·Updated this month·github.com/openai/codex

Claude CodeDesktop
Active
npm i -g @openai/codex

By OpenAI

Runtime
Local CLI or hosted task
Autonomy
Sandboxed by default in the cloud; local runs stay in the repo

openai.com/index/introducing-codex/

  • Scope

    Takes a task or a PR comment and writes a plan.

  • Work

    Edits, runs, and iterates inside the sandbox.

  • Review

    Shows the diff and the log. You merge.

  • Stop

    No leftover runner after the task ends.

Local CLI or hosted task

How it runs

Four beats, then it hands back.

  1. 1

    Scope

    Takes a task or a PR comment and writes a plan.

  2. 2

    Work

    Edits, runs, and iterates inside the sandbox.

  3. 3

    Review

    Shows the diff and the log. You merge.

  4. 4

    Stop

    No leftover runner after the task ends.

Maker

OpenAI

@openai · Lab

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Discussion

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