WordPress 4.5, aka “Coleman”, was released on April 12th. Here are some of the changes.
WordPress 4.5 New Feature Overview:
Inline Linking — Stay focused on your writing with a less distracting interface that keeps you in place and allows you to easily link to your content.
Formatting Shortcuts — Now they’re even more useful, with horizontal lines and <code>.
Live Responsive Previews — Make sure your site looks great on all screens! Preview mobile, tablet, and desktop views directly in the customizer.
And a whole slew of new developer tools!
You can also review the detailed release notes for WordPress 4.5 by following this link.