Vitalik Buterin challenges China's ASI race narrative amid US AI pause debate

On December 17, 2025, Ethereum co-founder Vitalik Buterin used X to question claims that the United States must avoid any AI slowdown to keep ahead of China in the race toward Artificial Superintelligence. He responded to Senator Bernie Sanders' call for a moratorium on large AI data centers by outlining pros and cons and suggesting a "pause button" for supercomputers instead. Citing recent data, Buterin argued that assertions about China's determination and capacity to lead the ASI race are overstated, pointing to higher US AI investment and China's ongoing hardware constraints.