# OpenAI releases GPT-5.6 suite in limited preview > Source: > Published: 2026-06-26 17:19:53+00:00 OpenAI has begun a limited preview of the **GPT-5.6** series, introducing three capability tiers: `Sol` (flagship), `Terra` (balanced), and `Luna` (fast, low-cost), according to OpenAI's announcement and reporting by 9to5Mac. Per the company, `Sol` gains two new modes, `max` for deeper reasoning and `ultra` which uses subagents to accelerate complex tasks. Multiple outlets report the rollout is restricted after a request from the U.S. administration: Axios and CNN say the White House's Office of the National Cyber Director and the Office of Science and Technology Policy asked OpenAI to preview the model with a small set of government-approved partners, and The Information reported CEO Sam Altman told staff access would be approved "customer by customer." The Verge published per-token pricing for `Sol` at **$5** input / **$30** output and described safety controls for cyber assistance.