Update: As noted below, the changes to how the Twitter character limits are counted are available to third party developers. MacStories has learned that Tweetbot and Twitterrific will both be updated soon to support the changes to Twitter’s APIs.

Tweetbot (pictured in screenshots) and Twitterrific will soon be updated to implement the changes to Twitter’s character limits.
Twitter began rolling out changes that take back space for text in tweets. As Twitter has gradually become a multimedia experience full of images, GIFs, videos, quoted tweets, and other things, each has encroached on the 140 character limit of a tweet leaving less room for text. That just changed.
Say more about what’s happening! Rolling out now: photos, videos, GIFs, polls, and Quote Tweets no longer count toward your 140 characters. pic.twitter.com/I9pUC0NdZC
— Twitter (@twitter) September 19, 2016
With a tweet today, Twitter began to roll out features, first announced earlier this year, that exclude certain things from the 140 character count limit. Users will still be limited to 140-character messages, but, as first reported by The Verge last Friday, media attachments (including images, GIFs, videos, and polls) and quoted tweets will no longer count against the 140-character limit, making more room for text.