This chapter is an experimental reflection on AI creativity, composed with ChatGPT 3.5. It argues that artistic agency is located in the human-machine interface (rather than in the AI or human exclusively). The argument is made by way of an adaptation of Luciano Floridi’s theory of artificial agency, drawing on Jean-François Lyotard’s work on the role of contingency in aesthetic creativity. Current debates around information technologies and contingency tend to present such technologies as a deterministic or probabilistic challenge to contingency. The chapter reverses this issue, arguing that in the human-machine interface, habitual human subjectivity can be understood as a limit to contingency, while contingency for the human can be generated by algorithmic processes which act as a “surprise” for human expectation. The chapter argues for a corrective duality of contingency provided by the machine and by the human in the human-machine interface (the Hybrid Artist Agent), where artistic agency may be thought to reside between the two, and agency is ascribable to the system as a whole. The chapter includes a performative dimension: its composition was in various ways conditioned by processes of algorithmic randomisation.