OpenAI releases GPT-5.6 Sol to 20 government-approved partners in restricted preview

OpenAI has released GPT-5.6 Sol, its most powerful model, to roughly 20 government-approved partners in a restricted preview — the first frontier model launch under a US government-managed access list. Sol is the top tier of a new three-model series (Sol, Terra, Luna), featuring a 'max reasoning effort' mode and planned multi-agent 'ultra' mode. The release follows a direct request from the Trump administration to stagger rollout, with the government approving access customer by customer. OpenAI publicly stated it does not want this process to become the long-term default but chose to cooperate. The move contrasts with Anthropic's experience, where Washington forced its Fable 5 and Mythos 5 models offline after a reported jailbreak. Sol is also available via Amazon Bedrock. The key open question is whether government-gated releases become the standard template for all future frontier models.

Source: https://thenextweb.com/news/openai-gpt-5-6-sol-limited-preview-government-approved-partners. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.