Runway's Gen-2 text/image-to-video model can now generate videos up to 18 seconds long. Previously it was only 4 seconds. The update is now available to all Runway Gen-2 users in the browser version and will be coming to the iOS app soon. See the following 18-second epic of red-bearded guys doing stuff on the streets of Japan. Any resemblance to living editors of this site is purely coincidental.
It looks like Runway is going full speed ahead with AI video, the start-up just released a major quality update for Gen-2 at the end of July.