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OpenAI says GPT-6 is much better with legacy programming languages such as COBOL and Fortran.

The DecoderIndependent reporting·
AI brief

OpenAI said it improved its latest models for low-resource programming languages including COBOL, Fortran and Visual Basic. On the new MultiLangBench benchmark, GPT-6 Astra reached an 87.4 percent test pass rate across 20 languages, up from about 38 percent for GPT-5.6 Terra.

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“OpenAI improved its latest models for low-resource programming languages like COBOL, Fortran, and Visual Basic. On the new MultiLangBench, GPT-6 Astra hits an 87.4 percent test pass rate across 20 languages, up from about 38 percent for GPT-5.6 Terra.”
The Decoder, 20 Oct 2026, 16:40.

Reporting from a publisher outside the organisation being covered.

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