Climate change poses significant global challenges. Solutions require new ways of working, thinking and acting. Knowledge co-production is often cited as one of the innovations needed for navigating the complexity of climate change challenges, yet how to best approach co-production processes remains unclear. In this working paper we explore the ways in which climate and development researchers are approaching the co-production of knowledge and grapple with the extent to which the modalities used are reaching their stated potential. Using a diverse array of case studies, we outline a range of approaches to co-production, from technical to transformative. Drawing on literature on co-production, we propose a heuristic that maps out a spectrum of approaches to co-production and offers an assessment of the relationship between processes and outcomes of co-production in order to enable more informed planning and decision-making. In so doing this paper provides lessons and insights that CARIAA and similar adaptation research initiatives can apply in determining the potential of knowledge co-production as a means to influence policy, practice and behaviour.