OpenAI launches GPT-5.6 Sol, Terra, Luna in restricted preview

OpenAI launched GPT-5.6 as a three-model family (Sol flagship, Terra mid-tier, Luna fast/cheap) in a limited preview restricted to trusted partners at the request of the U.S. government. Broader access is planned in coming weeks; Sol beats Mythos on some coding tasks but did not cross the Cyber Critical threshold.

Featured · Sam Altman