OpenAI has released its new flagship model, GPT-5.6 Sol, alongside two other tiers: Terra and Luna. GPT-5.6 Sol demonstrates strong performance, slightly surpassing Claude Mythos on the Terminal-Bench 2.1 benchmark. However, access to GPT-5.6 Sol is currently restricted to approximately 20 government-approved companies, a measure reportedly requested by the US government, mirroring similar restrictions placed on Anthropic's Fable 5 model. AI
IMPACT Government-imposed access restrictions on frontier models may become a trend, impacting broader adoption and competitive dynamics.
RANK_REASON Frontier-lab model release with system card and government-imposed access restrictions. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
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