OpenAI said on October 19, 2026 that its latest models are much better at writing and migrating code in low-resource languages such as COBOL, Fortran, and Visual Basic. In OpenAI's own MultiLangBench ...
OpenAI reports 87.4% average pass rate on MultiLangBench across 20 languages and 97.9% COBOL migration accuracy for GPT-6.1 ...
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