OpenAI Codex Evolution: Interactive Sites, Browser Annotations, and Business Plugins

Summary

At the “Intelligence at Work” event on June 2, 2026, OpenAI announced a massive expansion of Codex. The platform is evolving from a developer-centric tool into an agentic operating system for knowledge workers. Key highlights include “Codex Sites” for creating hosted websites via prompts, visual browser annotations, and six specialized business plugins.

What happened?

OpenAI has integrated Codex directly into the ChatGPT app for over one billion users. The main innovations are:

Codex Sites: Users can create interactive, hosted websites directly from a chat prompt.
Annotations: A visual feedback loop for targeted edits directly within the browser.
Six New Plugins: Tailored solutions for data analytics, creative work, sales, product design, equity investing, and investment banking.
Growth: Codex now has 5 million weekly active users, with the knowledge worker segment growing three times faster than developers.

Why it matters

This move marks the transition from AI as an advisor to AI as an active agent. By integrating into the web browser and the ability to produce independent artifacts (Sites), ChatGPT becomes a full-fledged tool for complex business processes. This represents a direct challenge to Anthropic and its enterprise agents.

Evidence

The announcement was made officially by OpenAI. Partnerships with companies such as Wix, Figma, and Replit underscore the industrial relevance. Tech media outlets like TechCrunch and Letsdatascience confirmed the details of the rollout and the impressive 600% growth since February.

Analysis

OpenAI is leveraging its massive user base to establish Codex as the standard for “agentic workflows.” While Anthropic’s Claude Code focuses heavily on developers, OpenAI is targeting the broad mass of office workers. The six plugins show a clear strategy: vertical integration into high-value industries like finance and product design.

Practical Takeaways

For Businesses: Business processes can be massively accelerated through the new plugins, especially in data analytics and sales.
For Creatives: Codex Sites enables rapid prototyping without programming knowledge.
Strategy: Companies should evaluate how the visual feedback loop (Annotations) can improve collaboration between AI and human experts.

Open Questions

What are the data privacy implications of using plugins in sensitive areas like investment banking?
When will the rollout be fully completed for all Plus and Enterprise users?
How will partners like Wix and Figma react in the long term to competition from Codex Sites?