OpenAI releases powerful new GPT-5.6 model under restrictions
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OpenAI is rolling out GPT-5.6 Friday, but says it's limiting access to all three versions of the new model at the behest of the U.S. government.
Why it matters: Washington is starting to treat the most advanced U.S.-developed AI models as products that need government review before they can be widely released.
The big picture: The move follows similar U.S. restrictions on Anthropic's powerful Fable 5 and Mythos 5 models.
Driving the news: OpenAI is releasing three versions of GPT-5.6: Sol, Terra and Luna. Sol is the most powerful. Terra offers a balance of efficiency and power and Luna is designed for speed and affordability.
- OpenAI will add options that allow for more reasoning as well as an "ultra" mode that splits work among multiple sub-agents.
GPT-5.6 is available as a limited preview to around 20 companies, whose participation has been approved by the government. OpenAI says they expect to expand access to more companies next week.
- Its goal is a broad release in the coming weeks.
- OpenAI says the government is aware of its plans to launch more broadly very soon and has expressed support for those plans barring any concerns in the additional testing period.
- The company has been previewing GPT 5.6 with the government for the past month, including in meetings CEO Sam Altman had with White House in early June.
- OpenAI might need to stagger the release, but did not anticipate severe restrictions, such as the government having to approve each customer and limiting it to around 20 partners at launch.
Between the lines: OpenAI made clear that while it is cooperating with the federal government, it doesn't see the current approach as either ideal or sustainable.
- "We don't believe this kind of government access process should become the long-term default," the company said in a blog post. "It keeps the best tools from users, developers, enterprises, cyber defenders, and global partners who need them."
- However, it said: "We are taking this short-term step because we believe it is the strongest path to broader availability in the coming weeks, while we work with the administration to develop the cyber Executive Order framework and a repeatable process for future model releases."
What they're saying: OpenAI is positioning what's happening with GPT-5.6 as the result of being in an in-between period where the government has announced a plan to evaluate new model releases but has yet to detail how that process will work.
- Anthropic is also negotiating with the government over safeguards before releasing its latest model, and OpenAI's situation shows that Anthropic is no longer being singled out.
- OpenAI said that it believes the Trump administration still has the best interests of U.S. AI competitiveness in mind despite its recent moves.
Zoom in: One of the big concerns around the latest models has been their significantly increased cybersecurity capabilities.
- OpenAI says it believes "GPT-5.6 Sol is better at helping people find and fix vulnerabilities than reliably carrying out end-to-end attacks" and said the model's capabilities don't reach the "critical" level outlined in its preparedness framework.
- "Based on our assessment of the model and safeguards, we expect substantial benefit for legitimate defensive work, while meaningfully constraining prohibited offensive use," it said.
What to watch: By August, as part of the Executive Order, the administration must establish a classified process to assess AI models' cyber capabilities and determine which qualify as "covered frontier models," a designation for AI systems with advanced cyber capabilities.
This story has been updated with new details throughout.
