During adolescence, the ability to engage in more complex decision-making strategies increases (Raab & Hartley, 2019). However, the successful use of a given decision-making strategy does not only depend on the mere ability to engage in it-it also depends on how flexible individuals are in adjusting their reliance on decision-making strategies to changes in internal and external demands. In this study, we ask how the ability for metacontrol of decision making (i.e. the dynamic adaptation of decision-making strategies; Eppinger et al., 2021;Ruel, Devine, et al., 2021) develops from adolescence into young adulthood and whether framing effects differentially affect the flexible usage of decision-making strategies in adolescents as compared to young adults.To study metacontrol, we draw on previous work that dissociates two major decision-making strategies: modelbased and model-free decision making (Daw et al., 2011;Dayan & Niv, 2008). Model-based decision making represents a deliberative, prospective strategy that evaluates different choice options by means of forward planning based on knowledge about the structure of the environment (a cognitive model). In contrast, model-free decision making represents a more reflexive, retrospective strategy that relies on previously experienced actionreward contingencies. Previous developmental research shows that the reliance on model-based decision making (but not model-free decision making) becomes more pronounced from childhood to adulthood