OpenAI launches GPT-5.6 Sol/Terra/Luna, restricted to government-approved partners

[AINews] OpenAI GPT-5.6 Sol / Terra / Luna — restricted to trusted partners

OpenAI announced three models—Sol (flagship), Terra (mid-tier), and Luna (fast/cheap)—but only as a limited preview for ~20 government-approved partners, at the US government's request. Sol hits 91.9% on Terminal-Bench 2.1 and beats Claude Mythos 5 on some coding tasks, but OpenAI says it doesn't cross the Cyber Critical threshold: it finds bugs but can't autonomously produce a full-chain exploit. Pricing: Sol $5/$30 per 1M tokens, Terra $2.5/$15, Luna $1/$6. The post doesn't disclose parameter counts, training data cutoff, or a timeline for general availability.

Why it matters: OpenAI announced three GPT-5.6 models but restricted access to ~20 trusted partners at the US government's request. Sol's 91.9% on Terminal-Bench 2.1 and its Mythos 5-beating coding performance are concrete signals, and the restricted rollout itself is a story. Not 95+ because...