China's AI startup Moonshot has unveiled its latest large model, Kimi K3, claiming it surpasses Anthropic Opus 4.8 on several benchmarks and rivals top models like OpenAI. This announcement has intensified market concerns over AI capital expenditure and chip demand, leading to significant stock market reactions. The Bloomberg Asia Semiconductor Index dropped over 6%, while Nasdaq 100 futures fell approximately 2%. Kimi K3, an open-weight model with around 2.8 trillion parameters, supports a 1-million-token context window. Its pricing is similar to Anthropic's Sonnet, but its overall cost is reportedly about half that of Claude Opus and GPT-5.5. The launch has caused notable declines in related stocks, with Chinese peer Z.AI plummeting 28% in Hong Kong, MiniMax Group falling 16%, and SoftBank decreasing 9% in Tokyo.