§ models · storyline

Moonshot AI releases 2.8T Kimi K3 model to rival Opus 4.8, GPT-5.5

Moonshot AI releases Kimi K3, a 2.8-trillion-parameter model the company says rivals Opus 4.8 and GPT-5.5, with open weights planned for release by July 27.

Jul 16 · 21:00:34 · primary fetch2 sourcesupdated Jul 16 · 21:49:39

Kimi: Moonshot AI releases Kimi K3, a 2.8T-parameter AI model that it says rivals Opus 4.8 and GPT-5.5, and plans to release model weights by July 27 — 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 …

read full article on kimi.com ↗

§ sources2 publications · timeline below

kimi.comMoonshot AI releases Kimi K3, a 2.8T-parameter AI model that it says rivals Opus 4.8 and GPT-5.5, and plans to release model weights by July 27 (Kimi)primary21:00:34
the-decoder.comKimi's open model K3 nears GPT-5.6 Sol and Fable 5 while signaling the end of super cheap Chinese AI21:49:39

§ how this story moved

21:00:34primary — Kimi publishes the launch post.
21:49:39The Decoder picks up coverage.