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Kimi K3 Built a Working Windows XP in the Browser as a Pre-Release Capability Demo
A single-prompt-style artifact hosted at windows-xp.kimi.site — a browser-based Windows XP recreation generated by Kimi K3 — drew 56 points and 32 comments on HN. It arrives 36 hours before Moonshot publishes K3's open weights and lines up with Lambert's report that K3 ranks #1 in Frontend Code Arena. Demos like this are marketing rather than evaluation, but the specific claim it supports — that an open-weight model can one-shot a large coherent frontend artifact — is the capability enterprises are actually substituting frontier models away from.
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