Earlier this year, Twitter promised it would be stopping counting media and other non-text content against its 140-character limit. Today, the company announced that embedded photos, videos, GIFs, polls and quoted tweets no longer count toward your 140 characters.
As the official Twitter account announced, photos, videos, polls, GIFs, and Quote Tweets will no longer count against your 140-character limit. The social-network-turned-news-platform has made it clear that these changes are meant to make it easier to use the platform in general, especially for new users.
https://twitter.com/twitter/status/777915304261193728
Twitter originally said that all @names, such as @iappTweak, would also no longer count towards the 140-character limit, but that change does not appear to have been implemented. There is no mention of it in Twitter’s announcement and @names are still counting in the character limit.
It is not clear if Twitter plans to eliminate @names from character count in the future, but the company has said it is exploring additional ways to allow people to better express themselves, so more changes could be in the works.
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Source: Twitter