OpenAI has launched three new GPT-5.6 series models: Sol, Terra, and Luna. The flagship Sol model, featuring 'max' and 'ultra' modes, demonstrates superior performance in coding and scientific tasks, surpassing Fable 5 and GPT-5.5 on benchmarks. Terra is positioned as a balanced model for daily work, comparable to GPT-5.5 but at half the price, while Luna offers the fastest and cheapest option for low-latency tasks. Despite the advanced capabilities, initial access to these models is limited to select partners for preview, with broader user availability expected later. AI
IMPACT Sets new SOTA on coding and scientific benchmarks, potentially impacting competitors like Anthropic's Fable 5.
RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
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