01OpenAI · GPTGPT-6 Astra / GPT-6.1 Sol / GPT-6 LunaReasoning that carries through to action
Model family
2026-09-29
- Progress
- GPT-6 Astra, introduced on September 3, combines scientific reasoning, software engineering, and computer use in multi-step workflows. GPT-6.1 Sol followed on September 29, bringing much of that capability to a lower-cost tier, alongside the high-throughput GPT-6 Luna. OpenAI reports that Sol matches Astra on DeepSWE v1.1 at roughly one-fifth the cost, while improving computer use and scientific workflows over GPT-6 Sol.
- Significance
- Reasoning combined with sustained tool use and cheaper experimentation connects model capability to end-to-end coding and scientific workflows.