OpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakes

Earlier this month, OpenAI launched GPT-6 Astra , which it heralded as its most powerful and capable model yet, and the “world’s best model” for a variety of activities, including computer work and coding. Now, the lab is expanding the GPT-6 generation with updated versions of the smaller Sol and Luna models.

“GPT-6 Astra introduced a new generation of intelligence; these models extend its benefits by making that intelligence more efficient and accessible,” the company writes.

The first models in the Sol and Luna series were introduced earlier this year , representing different tiers in OpenAI’s hierarchy of models. Sol is designed for complex tasks like coding, while OpenAI says Luna is more appropriate for clerical work — “high-volume tasks with a clear goal, like summarizing documents, extracting information, or answering quick questions.”