GoKawiilOpenAI touts improved COBOL coding and migration performance in new models
OpenAI released benchmark results showing its latest models, including GPT-6 Astra and GPT-6.1 Sol, perform significantly better at writing and migrating code in legacy languages like COBOL, Fortran and Visual Basic. Using an internal test suite called MultiLangBench, OpenAI reported Astra's average pass rate across 20 languages rose to 87.4 percent, though COBOL remained the toughest language at 72 percent. Separately, GPT-6.1 Sol reached up to 97.9 percent accuracy when migrating COBOL programs to languages such as Python, Java and Rust while preserving original program behavior.