OpenAI claims AI can migrate legacy COBOL code to modern languages with improved accuracy

OpenAI announced substantial improvements in its latest AI models' ability to migrate legacy software, such as COBOL, into modern languages like C++, Java, and Python. In internal tests, GPT-4.1 Sol achieved 87 percent behavior preservation accuracy at low reasoning effort and 98 percent at higher reasoning, potentially offering a solution for organizations maintaining critical infrastructure still reliant on decades-old code.