OpenAI launches GPT-6.1 Sol with Astra-like performance on a budget

OpenAI has officially launched GPT-6 Sol and GPT-6 Luna, two affordable models within the GPT-6 family. These models deliver GPT-6 Astra capabilities to faster, lower-cost tiers. While some reports mentioned GPT-6.1 Sol, official documentation only confirms Sol and Luna. These models are currently available via the OpenAI API and are rolling out to ChatGPT Work and Codex users across Plus, Pro, Business, Enterprise, and Edu plans, providing high performance on a budget.