Here is the WordPress 4.5
WordPress is a tool that helps you to create a website, and it is just updated.
With the version 4.5, do not expect major ui changes. There are small but helpful changes. First, there is a better interface to insert lines. Unlike the previous version, there is only one place that you can write your url on it. You can either put your link on it or just write your name of the post, and the url will be inserted automatically.
Second, while customizing your theme, you easily see how your website looks on different devices including tablets and mobile phones.
Third, in the theme customization screen, you can get a live preview for your changes. This is a really useful feature. Forth, with the new update, new images load 50% faster. It was a needed feature, because previous WordPress versions were really slow at it if you were trying to uploaded so many photos at once.