OpenAI has announced a limited preview of its new GPT-5.6 series, featuring three models: Sol, Terra, and Luna. Terra offers performance comparable to GPT-5.5 at half the price, while Luna provides strong capabilities at a lower cost. The company plans a full release in the coming weeks, following communication with the U.S. government regarding the models' capabilities and release plans. As requested by the U.S. government, the initial preview will be limited to a small group of vetted, trusted partners. AI
IMPACT New models offer tiered performance and cost options, potentially broadening access to advanced AI capabilities.
RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
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