OpenAI Launches Next-Generation GPT-5.6 Series Models, Now in Limited Preview for Select Partners

Odaily OpenAI has officially launched the preview version of its next-generation GPT-5.6 series models, including the flagship model Sol, the balanced model Terra, and the fast, low-cost model Luna. GPT-5.6 introduces a new maximum reasoning effort and features a super mode that can accelerate complex tasks through sub-agents. The model boasts enhanced agentic capabilities in areas such as coding, biology, and cybersecurity. In terms of pricing, per 1 million tokens, Sol costs $5 for input and $30 for output; Terra costs $2.5 for input and $15 for output; Luna costs $1 for input and $6 for output.

The model is currently in limited preview for a select group of trusted partners, with plans for a full rollout in the coming weeks. Additionally, the model will be available on Cerebras in July.