Introducing GPT-6 Sol and Luna
OpenAI ships GPT-6 dual-model line: Sol for raw capability, Luna for cost-efficiency.

Why it matters
OpenAI's release of GPT-6 Sol and Luna signals a strategic pivot toward model stratification — offering practitioners explicit capability-vs-cost tradeoffs rather than a single frontier tier. This shapes budget planning and workload allocation across enterprise and indie teams.
The key facts
5 to knowTwo GPT-6 variants released simultaneously
Sol positioned for frontier capability
Luna positioned for cost-efficiency
Release date: September 22, 2026
Dual-tier strategy targets different workload classes
Go to the source
OpenAI Blogopenai.com
Publisher excerpt: Meet GPT-6 Sol and Luna, two models that bring frontier intelligence to everyday work with different balances of capability and cost.