Gemini 4 Argon migrates Fortran ocean model to Rust in 59 minutes

Using Gemini 4 Argon within Google Antigravity, developers migrated a 174,000-line Fortran coastal ocean model into memory-safe Rust in 59 minutes. The autonomous agent handled blueprinting, refactoring, and testing while catching legacy bugs, halving memory usage, and achieving a 1.88x speedup. Open article →