OpenAI unveils GPT-5.6 Sol, Terra and Luna models — but only accessible to limited preview partners for now, per US Gov

Insight summary

• •OpenAI has launched a limited preview of its GPT-5.6 family with three variants: Sol, Terra, and Luna, tailored for different enterprise AI tasks.
• •Sol targets complex coding and security research, Terra suits high-volume business tasks, and Luna is optimized for faster, low-cost everyday work.
• •The models are initially accessible to about 20 trusted organizations as part of cooperation with the U.S. government and are planned for public release soon.
• •U.S. federal agencies are benchmarking and assessing AI models for safety following a president's executive order, influencing the staggered launch.
• •Pricing varies significantly: Sol costs $5.00/$30.00, Terra $2.50/$15.00, and Luna $1.00/$6.00 per million input/output tokens respectively.
• •All GPT-5.6 models are rated as “High” risk for cyber and bio/chemical capabilities, imposing governance requirements for sensitive use cases.
• •OpenAI’s release strategy reflects regulatory concerns, including previous U.S. actions on competitors like Anthropic.