Originally published on AI Tech Connect.
What builders need to know The headline is real, the weights are not out yet. Kimi K3 shipped on 17 July 2026 (some outlets reported 16 July) across Kimi.com, Kimi Work, Kimi Code and the Kimi API. Moonshot has promised the open weights "by 27 July 2026" — but at launch there is no public repository, checkpoint, model card, licence or safety report. Access is API-only for now. 2.8 trillion total parameters. Moonshot claims it is the largest open-weight model ever released. It is a Mixture-of-Experts design, so most of those parameters are dormant on any given token — but the company has not disclosed enough to derive a reliable active-parameter count. It won the one independent test that matters most to front-end teams. K3 ranked first on the Frontend Code Arena at 1,679 points in blind…
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