In 2005/06 there was a Janes report about this artificial intelligence capability of Brahmos. Yeah, it is true. Brahmos missiles can communicate between them in flight. Not only that, it was reported that they can decide the best possible way to attack the enemy. Say if after the launch of the missile, it was found by oner brahmos that a target is lost or not there, so it will communicate with other brahmos missiles and share a target. There were some details in that Janes article.