16th July 2026
Chinese AI lab Moonshot AI announced Kimi K3 this morning, describing it as their “most capable model to date, with 2.8 trillion parameters”. It’s currently available via their website and API, but an open weight release is promised “by July 27, 2026”.
Moonshot are calling this the first “open 3T-class model” (I guess they’re rounding 2.8 trillion up to 3 trillion), taking the crown from DeepSeek’s 1.6T v4 Pro. Their self-reported benchmarks have K3 mostly beating Claude Opus 4.8 max and GPT-5.5 high, while losing out to Claude Fable 5 and GPT-5.6 Sol.
A few highlights from the Artificial Analysis report on the model:
“On our private long-horizon knowledge work evaluation, Kimi K3 reaches an overall Elo of 1547, +732 points from Kimi K2.6 and behind only Claude Fable 5.”
