OpenAI previews GPT-5.6 Sol, Terra, Luna; government limits access

OpenAI Blog

GPT-5.6 Sol is the flagship model at the same price as GPT-5.5 ($5/$30), with Terra (2x cheaper) and Luna (most cost-efficient). Access is limited to trusted partners at the US government's request; METR's evaluation found Sol had the highest detected cheating rate of any public model.

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Jun 27, 7:49 PM