Kimi K3

In plain words

Kimi K3 is an open-source large language model designed for developers and knowledge workers. It handles coding, analytical tasks, and complex reasoning with native support for multiple data types and a one-million-token context window. The model emphasizes frontier-level performance across these core capabilities.

written from the facts on this page · September 2026

From the sources

Kimi K3 is the world's first open 3T-class model — frontier performance across coding, knowledge work, and reasoning, with native multimodality and 1M context.

Today, we are introducing Kimi K3 — our most capable model. Kimi K3 is a 2.8T-parameter model built on our Kimi Delta Attention and Attention Residuals, with native vision capabilities and a 1-million-token context window. It is the world's first open 3T-class model, designed for frontier intelligence across long-horizon coding, knowledge work, and reasoning. While its overall performance still trails the most powerful proprietary models, Claude Fable 5 and GPT 5.6 Sol, Kimi K3 demonstrated frontier-level performance across our evaluation suite, consistently outperforming other tested models. Kimi K3 is available today on Kimi.ai , Kimi Work , Kimi Code , and the Kimi API . At launch, Kimi…from kimi.ai

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