LLM Agents GPU-Ported a 250k-Line Weather Code and Flagged 5 Silent Bugs
Researchers used an AI agent to GPU-port CReSS, a 250,000-line legacy Fortran weather code, validating each kernel against dumps from a real typhoon run. It produced 162 verified GPU kernels at 5.1x speedup while catching numerical discrepancies in five. The takeaway: AI-assisted porting demands validation-centric workflow design, not just code generation.