OpenAI previews GPT-5.6 with government vetting of who gets access

OpenAI previewed a new model family, GPT-5.6, in three sizes: Sol as the flagship, Terra for everyday work, and Luna as the fast, cheap option. The capability story is the usual one, stronger results in coding, science, and cybersecurity. The unusual part is how you get it. OpenAI says general availability is weeks away, but the preview is going only to "trusted partners whose participation has been shared with the government," after the company showed the models to US officials and agreed to a limited rollout at the government's request.

That is a real shift in how a major lab ships a model. Pricing is public and ordinary by comparison: Sol runs $5 per million input tokens and $30 output, Terra $2.50 and $15, Luna $1 and $6, with new prompt caching that gives a 90 percent discount on cached reads and a 30 minute minimum cache life. The access rules are what stand out, and they follow the recent directive that suspended access to Anthropic's Fable 5 and Mythos 5. Frontier capability and gated distribution are starting to arrive together.

Why it matters

If you build on OpenAI models, you can no longer assume the newest one will be available to you on day one, or at all. Plan for the possibility that access to the strongest models depends on who you are and whether your use has been cleared, not just on your ability to pay.