GIF files as large as 15 MB can now be attached to posts on Twitter, allowing users to upload higher-quality animated images. Twitter had previously limited GIFs to 5 MB, a limit that still exists for regular photos. A few users came across the change, notifying everyone else of the ability.
For now, the larger GIF uploads only work on the web version of Twitter and this change also doesn't apply to Twitter clients.
is the gif size limit updated? pic.twitter.com/cepHOOJSg2— Ryan Penagos (@AgentM) July 11, 2016
Twitter didn't make an announcement about the update, but the new max file size for GIFs is reflected in Twitter's guidelines.