Twitter’s 140 characters limit no longer counts @names, media attachments and quoted tweets

Twitter has just made a big change to the way tweets work. From today, Twitter is cutting back on what types of content will use up its 140-character limit. Now, @names in replies, media attachments (like photos, GIFs, videos, and polls) and quoted Tweets will no longer be counted against the valuable 140 characters that make up a tweet. This allows for richer public conversations that are easier to follow on Twitter and ensures people can attach media to tweets without sacrificing the characters they have

Source: All You Need to Know About Twitter’s 140 Character Update