# Source: https://developers.openai.com/changelog/codex/2025-06-13.md

# Best of N

- Date: 2025-06-13
- Products: Codex

## Changes
- Added some keyboard shortcuts and a page to explore them. Open it by pressing ⌘-/ on macOS and Ctrl+/ on other platforms.
- Added a “branch” query parameter in addition to the existing “environment”, “prompt” and “tab=archived” parameters.
- Added a loading indicator when downloading a repo during container setup.
- Added support for cancelling tasks.
- Fixed issues causing tasks to fail during setup.
- Fixed issues running followups in environments where the setup script changes files that are gitignored.
- Improved how the agent understands and reacts to network access restrictions.
- Increased the update rate of text describing what Codex is doing.
- Increased the limit for setup script duration to 20 minutes for Pro and Business users.
- Polished code diffs: You can now option-click a code diff header to expand/collapse all of them.

![](https://developers.openai.com/images/codex/changelog/best-of-n.png)

Codex can now generate multiple responses simultaneously for a single task, helping you quickly explore possible solutions to pick the best approach.