OpenAI GPT-5.6 Sol / Terra / Luna restricted to trusted partners

OpenAI launched GPT-5.6 as three models: Sol (flagship), Terra (mid-tier), and Luna (fast/cheap). Access is limited to trusted partners at the request of the U.S. government, with broader availability planned in weeks. The model beats Mythos on coding agent tasks but does not cross the Cyber Critical threshold.

Featured · Sam Altman