China’s Alibaba unveiled new artificial intelligence chip technologies and plans for more powerful models on Tuesday, including what it said was China's most powerful AI chip, days ahead of a meeting between Chinese and U.S. leaders at which competition to lead on AI technology is expected to be a major theme. Alibaba’s announcement came as U.S. AI leaders, including Anthropic CEO Dario Amodei, are warning that China's development of AI poses a threat to the United States and calling for an overall slowdown on development of the technology.