This chapter argues that the reason why AI can be so unsettling is not in how the powers of the technology alter what a computer (or computers) might do as it alters how the human (the ‘user’) and the AI enabled-computer itself do things together. Through their joint interaction, the outcomes of their endeavors co-evolve. Each is partly constituted in that interaction. The chapter explores what this means for the design of interfaces and interaction grammars with AI machines, for the notion of the user, and more generally, for the evolution of intelligence and its ‘machinic’ forms.