OpenAI has begun previewing its new GPT-5.6 models, named Sol, Terra, and Luna, to a select group of partners. These models are reportedly tiered from highest performance to most cost-effective. Early benchmark results for the GPT-5.6 series appear promising, suggesting advancements in AI capabilities. AI
IMPACT Sets new SOTA on coding benchmarks; pressures Anthropic to respond.
RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=2 ai=1.0]
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