LLM-assisted two-stage translation ported the full FESOM2 production ocean model from Fortran to C++/Kokkos, reproducing long-term statistics and achieving 1.6-3.7x GPU speedup on large meshes while preserving physics.
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An Ocean Model Ported by a Large Language Model: Experience and Lessons from FESOM2 (Fortran to C to C++/Kokkos)
LLM-assisted two-stage translation ported the full FESOM2 production ocean model from Fortran to C++/Kokkos, reproducing long-term statistics and achieving 1.6-3.7x GPU speedup on large meshes while preserving physics.