OpenAI introduces a series of improvements to Codex designed to turn it into a more integrated and practical development companion. Can you imagine delegating repetitive tasks, seeing clear diffs and reviewing pull requests from your phone? That's exactly what this update aims for, and yes, it comes with controls so you don't lose the reins. (openai.com)

What's changing in Codex

The updates are concrete and focused on fitting into your workflow: Codex is no longer just a demo inside ChatGPT — now it’s available from the terminal, IDE extensions like VS Code, web integrations and via the CLI. You can start tasks, generate patches, run tests and push PRs without leaving the environment you already use. (openai.com)

Also, a set of technical capabilities was added to improve the experience and operational safety: