OpenAI launches GPT-6 Astra coding model for legacy languages

OpenAI announced GPT-6 Astra, an AI coding model tailored for COBOL, Fortran, Visual Basic and other older languages. It scores 87.4% across 20 languages on MultiLangBench, up from 26.8% for GPT-5.6 Sol, and 86.8% on COBOL migration (97.9% at high reasoning effort) versus 5.4%. The model is available to developers via the OpenAI API.

• MultiLangBench: 87.4% for GPT-6 Astra vs 26.8% for GPT-5.6 Sol
• COBOL migration: 86.8%, rising to 97.9% at high reasoning effort
• GPT-5.6 Sol scored just 5.4% on COBOL migration
• Available via API for COBOL, Fortran, OCaml and Visual Basic