Kimi K3 is a mixture-of-experts model with 104 billion active parameters that elevates open-weights models to a new performance tier and has released complete infrastructure tools for large-scale agent training.
Kimi K3 as an open frontier model with native vision, million-token context, and 2.5× better scaling efficiency compared to K2, with all weights released.
Chinese open models are narrowing the distance to closed systems, while fragmented benchmarking practices obscure the measurement of actual performance differences.
Kimi K3 is the most powerful open-source model ever released, closing the gap between open-source and frontier models from an estimated 6–9 months to approximately 3–5 months.
Kimi K3 is the first “Open 3T-class” model from a Chinese lab, priced at $3 per million input tokens and $15 per million output tokens — significantly more expensive than earlier Moonshot models.
