OpenAI CEO Sam Altman on Saturday announced launch of GPT‑5.6 series, which features three models, in limited preview. "Good new first: Sol is a smart, efficient, and…is the same price as GPT-5.5," Altman said. "Bad news: at…request of…US government, it's launching today in limited preview," he said, adding that staged rollouts "isn't quite the process that we think is optimal".