China's Moonshot AI launched its Kimi K3 model overnight, sending a shockwave through global markets Friday. The company's 2.8-trillion-parameter open-weight model ranks alongside top U.S. systems from Anthropic and OpenAI on key benchmarks.

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The announcement triggered immediate selling pressure. Semiconductor stocks led the decline, with the VanEck Semiconductor ETF (SMH) falling below a critical support level for the first time since April. The Nasdaq Composite slid 1.5%.

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The event draws direct parallels to the DeepSeek R1 release in early 2025, which challenged the assumption that cutting-edge AI requires massive U.S. infrastructure investment. Analysts view K3 as confirmation that Chinese AI labs are closing the performance gap.

Moonshot AI is backed by Alibaba and was valued at $31.5 billion. The full model weights will be publicly available by July 27, increasing pressure on U.S. firms to justify their heavy spending.