Beyond 140 characters
Tweets are holding steady at 140 characters, but a variety of additions to your tweets will no longer count against that limit. As the Verge reported last week,Twitter said today it was rolling out expanded tweets around the world. Media attachments including images, GIFs, videos, and polls will no longer count against the 140-character limit. Neither will quote tweets, though if include a link to another tweet in your own that will count as normal.
The company is also testing out new replies that will omit usernames of the people you are replying to from the character limit. If you reply to multiple people at once, Twitter omits all of them from your tweet, according to a GIF the company shared.