OpenAI says GPT-6.1 Sol now migrates COBOL correctly 86.6% of the time, up from 5.4%

OpenAI says GPT-6.1 Sol can now move old COBOL programs to modern languages with far fewer mistakes. In two new tests OpenAI built and ran itself, GPT-6.1 Sol passed 86.6% of COBOL migrations at low reasoning effort. GPT-5.6 Sol managed 5.4%, and the new model cost 39% less to run. At higher…

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