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OpenAI Codex May 2026 updates: Codex for Chrome + Codex CLI 0.129.0

OpenAI’s Codex changelog highlights two May 2026 updates: a new Codex for Chrome extension and a Codex CLI 0.129.0 release with TUI improvements, plugin management updates, hooks tooling, and more.

By AI Coding Tools Directory•2026-05-08•4 min read

Last reviewed: 2026-05-08

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AI Coding Tools Directory

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The AI Coding Tools Directory editorial team researches and reviews AI-powered development tools to help developers find the best solutions for their workflows.

OpenAI’s Codex changelog includes two notable May 2026 updates: a new Codex for Chrome extension and a feature-heavy Codex CLI 0.129.0 release.

TL;DR

Codex for Chrome: Codex can operate in the browser via a new Chrome extension, running in the background across tabs with user-controlled site permissions.
Codex CLI 0.129.0: adds Vim-mode editing in the TUI, improves resume/fork flows, expands plugin management, and adds new hooks tooling (plus many bug fixes).

Codex for Chrome

OpenAI describes Codex for Chrome as a Chrome extension that lets Codex work with apps and websites in the browser.

Key points OpenAI calls out:

runs across tabs in the background
does not take over your browser
you control which sites Codex can use

Codex CLI 0.129.0 highlights

OpenAI’s changelog lists a large set of changes; a few that matter most for developer workflows:

TUI editing: modal Vim editing ("vim mode") for terminal-based usage.
Navigation / session control: redesigned resume/fork picker and improved scrollback and diff workflows.
Plugins: expanded plugin management (including access controls and remote sync workflows).
Hooks: a /hooks browser plus additional hook capabilities.

For teams standardizing on terminal agents, these changes are mostly about speed and ergonomics rather than new capabilities.

Sources

OpenAI Developers — Codex changelog: https://developers.openai.com/codex/changelog
OpenAI Developers — Codex for Chrome: https://developers.openai.com/codex/chrome-extension

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Frequently Asked Questions

What is Codex for Chrome?

Codex for Chrome is an OpenAI Codex extension that lets Codex work with apps and websites in the browser, running across tabs in the background with user-controlled site permissions.

What’s new in Codex CLI 0.129.0?

OpenAI lists multiple Codex CLI 0.129.0 upgrades including Vim-mode editing in the TUI, a redesigned resume/fork picker, improved plugin management and hooks workflows, and many bug fixes.

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