Résumé
SMEs, including cultural and creative firms, are encountering increasingly difficult obstacles in today's competitive landscape. In particular, during the COVID-19 pandemic, these SMEs had to confront significant challenges that endangered their survival, requiring a shift in their business model. Many successful firms responded to this crisis by adopting business model innovation (BMI) as a strategic solution. The pandemic also emphasised the importance of sustainable practices and the necessity to enhance readiness for and responsiveness to future challenges. This study proposes examining Sustainable Business Model Innovation in the light of the Theory of Planned Behavior. While some studies have explored BMI through the TPB framework, we expand the interpretative schema by introducing an additional predictor: the influence of open innovation ecosystem partnerships. From an open innovation perspective, the new construct proposes how peer professional organisations and technological clusters play a significant role in managers' intentions to implement SBM. A purposive sample of 122 Spanish cultural and creative firm managers and business owners was surveyed and analysed using PLS-SEM. The data collected supports the model and supports the prominent role of open innovation environments as a mediation effect of the intention to implement a sustainable and innovative business model. The study adds new insights into the theoretical framework to better understand the implementation of sustainable business models' innovation actions, with specific support for the role of open innovation ecosystems such as professional organisations and technological clusters. Practitioners and open innovation ecosystem promoters can gain new clues for initiatives to promote the diffusion of innovations among creative and cultural SMEs.