OpenAI unveils GPT-5.6 Sol, Terra and Luna models — but only accessible to limited preview partners for now, per US Gov

OpenAI is announcing a limited preview of its next-generation GPT-5.6 model series today, introducing three distinct, capability-tiered models—Sol, Terra, and Luna—designed to re-engineer developer and enterprise workflows. Rolled out initially to a select cohort of approximately 20 trusted organizations in… OpenAI is announcing a limited preview of its next-generation GPT-5.6 model series today, introducing three distinct, capability-tiered models—Sol, Terra, and Luna—designed to re-engineer developer and enterprise workflows. Rolled out initially to a select cohort of approximately 20 trusted organizations in coordination with the U.S. government, the new series establishes a permanent shift toward multi-agent architecture, deep-reasoning configurations, and granular token pricing. The flagship model, GPT-5.6 Sol, enters the market priced at $5.00 per million input tokens and $30.00 per million output tokens, bringing a major step-change in performance for long-horizon coding and cybersecurity tasks.However, this rollout marks a highly unusual chapter in AI deployment. Because OpenAI is coordinating its release framework with the White House ahead of a broader public launch, enterprise buyers must navigate a novel landscape of real-time safety interventions, mandatory compliance parameters, and structured token caching systems. Technology: Deep Reasoning and the Multi-Agent ParadigmThe core architectural evolution of the GPT-5.6 series centers on how compute is allocated…