This dataset contains the used atmosphere, land, wave, and ocean model namelist files and settings for the 30-year km-scale nextGEMS Cycle 4 production simulations with IFS-FESOM (TCo1279 atmosphere at 9km resolution + 5km ocean) as described in the study Segura, Pedruzo-Bagazgoitia, Weiss, Müller, Rackow, Lee, Dolores-Tesillos, Benedict et al.: nextGEMS: entering the era of kilometer-scale Earth system modeling This work was supported by the European Union's Horizon 2020 collaborative project NextGEMS (grant number 101003470). For more infos about the nextGEMS project, see https://nextgems-h2020.eu (last access: 23.01.2025). The IFS-FESOM model has been presented here: Rackow, T., Pedruzo-Bagazgoitia, X., Becker, T., Milinski, S., Sandu, I. et al.: Multi-year simulations at kilometre scale with the Integrated Forecasting System coupled to FESOM2.5 and NEMOv3.4, Geosci. Model Dev., 18, 33–69, https://doi.org/10.5194/gmd-18-33-2025, 2025.