Alibaba Group Holding’s open-weight models have accumulated more than 3 billion global downloads in the past six months, eclipsing Meta Platforms Inc., Alphabet Inc. and domestic peers to become the world’s No. 1 artificial-intelligence model.Qwen, Alibaba’s family of AI models, has open-sourced more than 460 models and its ecosystem has spawned 300,000-plus derivatives, the Chinese technology company said in an emailed statement. Google, part of Alphabet, had 418 million downloads while Meta st...