The current balance of power in open models

Chinese AI companies have become leaders in open-weight language models like GLM-5.2 and Kimi K3, surpassing U.S. efforts in commercial viability. True open-source models, including Allen Institute's Olmo, remain primarily U.S.-based but less commercially dominant. Open models vary on a spectrum from fully open-source to closed API-based systems, with companies like Nvidia releasing partial training data.