OpenAI has officially taken the wraps off GPT-5.6, its most advanced family of AI models to date. There’s just one catch: unless you’re one of a handful of approved customers, you won’t be able to try it anytime soon. Instead of a broad launch, the company is beginning with a tightly controlled preview while it works through a new U.S. government review process.
GPT-5.6 is here, but only a few people can use it
The GPT-5.6 family consists of three models: Sol, the flagship model designed for the most demanding workloads, Terra for balanced reasoning and everyday tasks, and Luna, a faster and more affordable option. According to OpenAI, GPT-5.6 delivers improvements in coding, scientific reasoning, cybersecurity, biology, and long-running autonomous tasks. The flagship Sol model also introduces advanced operating modes like Max for deeper reasoning and Ultra for orchestrating sub-agents across complex workflows.
However, the biggest headline isn’t the technology itself. It’s who gets to use it. As first reported by The Wall Street Journal, GPT-5.6 will initially be available only to a small group of customers approved by the Trump administration while the model undergoes additional national security reviews. OpenAI says this is a temporary measure during the rollout of a new federal oversight framework and hopes to make GPT-5.6 broadly available in the coming weeks.
Beyond government scrutiny, OpenAI also appears to be doubling down on security from a technical standpoint. Alongside GPT-5.6 Sol, the company says it has deployed its “most robust safety stack yet,” strengthening real-time protections against high-risk cyber activity and repeated misuse attempts. OpenAI says the model was hardened through extensive human red-teaming as well as over 700,000 A100 GPU-equivalent hours of automated safety testing before release.
The model is impressive. The rollout may be the bigger story.
The decision to restrict access to GPT-5.6 and allow only a small group of approved customers to use OpenAI’s most advanced models isn’t particularly surprising. Just a few weeks ago, the U.S. government forced Anthropic to restrict access to its Claude Mythos 5 and Fable 5 frontier AI models over national security concerns. While Mythos has since returned for select users, Fable 5 remains unavailable to the broader public and is currently restricted to approved U.S.-based entities. OpenAI is now following a similar playbook.
“As part of our ongoing engagement with the U.S. government, 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 said in its announcement.
The company says it will continue working through the required security vetting process before expanding access to GPT-5.6, although it hasn’t shared a timeline for a wider rollout. At the same time, OpenAI made it clear that it does not believe this kind of government approval process should become the long-term default for releasing frontier AI models.
Beyond government scrutiny, OpenAI also has another reason to proceed cautiously. Earlier this week, Anthropic alleged that Chinese tech giant Alibaba used thousands of user accounts to systematically access Claude and distill its responses to improve the Qwen family of AI models. Similar allegations have surfaced in the past, underscoring the growing concern that frontier AI models could be copied or exploited before their developers can adequately secure them. Whether that’s a direct factor behind OpenAI’s cautious rollout or not, one thing is becoming increasingly clear: launching the world’s smartest AI models is no longer just a technical challenge. It’s quickly becoming a geopolitical one