Breaking News: Codex Is Now Rolling out to ChatGPT Plus Users

On June 3, 2025, OpenAI announced that Codex's availability to ChatGPT Plus users is underway. Previously, only ChatGPT Pro, Enterprise, and Team users could access it. What is Codex? What are the major improvements to this OpenAI's coding assistant? This post from EaseMate AI will answer all these questions for you. Let's dive into it!

What Is Codex?

Codex is OpenAI's coding assistant that runs many coding tasks in the cloud sandbox environment in parallel. Supported by codex-1, it is designed to generate code that closely mimics human style and PR preference. This cloud-based software engineering agent can be widely used to write, test, and debug code for developers.

This cloud-based coding agent is built into ChatGPT's interface, allowing you to assign coding tasks or pose questions in its sidebar while Codex operates autonomously in the background. This lets you concentrate on higher-priority tasks.

5 Main Features of Codex

What can Codex do? Here are 5 main features that demonstrate its capability in programming:

What Are Major Improvements in Codex

Several days ago, OpenAI rolled out Codex for ChatGPT Plus users and also updated some of its features to provide a more powerful, reliable, and versatile coding service. According to the latest Codex changelog, OpenAI has made the following improvements:

• Expand the range of users: In the past, Codex was limited to Enterprise, Team, and Pro users, but now users can use ChatGPT Plus for $20 per month to create a programming environment and delegate tasks to AI.
• Internet access: In the new version, Codex can access the Internet when performing tasks. This means that developers don't need to configure the environment manually anymore. Codex can do everything automatically for you, including installing basic dependencies, running code checks, performing tests, and more.
• Voice dictation: Codex now supports voice dictation, enabling users to dictate tasks directly to the AI assistant. In other words, users can speak the task, so that Codex can receive instructions more naturally.
• Update existing PRs: Developers can now update existing pull requests when following up on tasks, streamlining the workflow for managing code changes. This enhancement simplifies collaboration and ensures that updates can be made efficiently.

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Other Fixes and Improvements

At the same time, OpenAI also made some progress at technical levels, including:

1. 1. Support for Binary Files: You can now work with all file types when applying patches. However, for pull requests, you can only delete or rename binary files for now.
2. 2. iOS Fixes: Resolved a problem on iOS where follow-up tasks appeared twice in the task list.
3. 3. Pull Request Status Update: Fixed an issue on iOS where pull request statuses were outdated.
4. 4. Follow-Up Environment Fix: Corrected a problem where follow-up tasks started with the wrong state instead of the latest one.
5. 5. Task Events and Logs: Improved the internationalization of task events and logs.
6. 6. Better Error Messages: Enhanced error messages for setup scripts.
7. 7. Increased Task Diff Limit: The limit for task diffs has been raised from 1 MB to 5 MB.
8. 8. Longer Setup Script Duration: The time limit for setup scripts has been extended from 5 to 10 minutes.
9. 9. Improved GitHub Connection: The process for connecting to GitHub has been refined.
10. 10. Live Activities on iOS: Live Activities have been re-enabled on iOS after fixing a notification issue.
11. 11. Two-Factor Authentication Update: The requirement for two-factor authentication has been removed for users using SSO or social logins.

Wrapping Things Up

Not only does Codex offer support for ChatGPT Plus users, it also brings internet access, voice dictation, PR updates, and more. The release and update of Codex marks a significant breakthrough in AI-assisted coding. Smart, contextual, and collaborative, it serves as a strong boost for various coding tasks.