Quoting OpenAI
OpenAI previews the GPT-5.6 series (Sol, Terra, Luna) with lower pricing and government-coordinated limited release.
“We previewed our plans and the models' capabilities ahead of today's launch. At their request, we are starting with a limited preview for a small group of trusted partners whose participation has been shared with the government, before releasing more broadly.”
OpenAI announced a limited preview of its GPT-5.6 model family (Sol, Terra, Luna) with tiered pricing, cheaper tiers, and improved prompt caching. Notably, the release is being coordinated with the U.S. government, with initial access restricted to vetted partners shared with officials before broader availability, signaling a new norm of government pre-clearance for frontier model launches.