Chinese labs Moonshot and Alibaba release open-weight models as US rivals stay proprietary

Moonshot released Kimi K3 (2.8 trillion parameters) and Alibaba previewed Qwen3.8 (2.4 trillion), both as open-weight — meaning the model weights are freely available for anyone to download and use. Leading US labs OpenAI and Anthropic keep their frontier models proprietary and do not disclose parameter counts. Both Chinese models claim near-frontier performance, though rankings are self-reported and await independent verification.