China's Moonshot unveils world's largest open AI model, closing in on US rivals

Moonshot unveiled Kimi K3, a 2.8 trillion-parameter model it says is the world's largest open-weight AI and performs close to Anthropic's Fable.
Kimi K3 supports a 1‑million-token context window for advanced reasoning and long-horizon coding, letting it tackle much bigger, multi-step tasks in one prompt.
The release underscores how fast Chinese AI is catching up — cheaper, rapidly released trillion-parameter models (backed by groups like Alibaba and Tencent) are narrowing the gap with U.S. rivals.