The White House requested that OpenAI limit access to a select group of partners due to GPT-5.6 Sol’s advanced capabilities.
OpenAI announced a limited preview of its GPT-5.6 Sol model, the company’s latest and most advanced model, after the U.S. government requested that the company restrict its initial release while additional evaluations continue.
According to OpenAI, the limited release follows discussions with the White House regarding the model’s capabilities and the need for additional security evaluation before broader deployment. The company said it is continuing to assess the system’s performance and potential safety risks as part of the preview.
OpenAI said GPT-5.6 Sol delivers improvements across a range of advanced reasoning and problem-solving tasks while demonstrating stronger performance on complex scientific, mathematical, and software engineering challenges. The company also highlighted improvements in reliability and its ability to carry out extended, multi-step tasks.
The company said it conducted additional safety evaluations before making the model available. Those assessments examined areas including cyber capabilities and other catastrophic risks. OpenAI said the restricted preview allows it to continue gathering evidence and refining safeguards before considering broader availability.
“The U.S. government asked us to preview GPT-5.6 Sol with a limited set of organizations while we continue additional evaluations,” the company said in its announcement.
The announcement comes as the White House has taken an increasingly active role in overseeing the release of frontier AI models. Earlier this month, the U.S. government ordered Anthropic to suspend access to its Fable 5 and Mythos 5 models over national security concerns before later permitting a limited rollout of Mythos 5 to selected U.S. organizations. OpenAI’s decision to preview GPT-5.6 Sol to a restricted group at the government’s request marks the second time this month that federal officials have directly influenced the deployment of a frontier AI model.
OpenAI did not announce a timeline for expanding access to GPT-5.6 Sol.
