Together AI· Inference platform

Kimi K3: The Complete Developer Guide

What you'll learn What is Kimi K3, and what makes it different? What is under the hood: KDA, Attention Residuals, and the Stable LatentMoE architecture How do you use reasoning effort, streaming, tools, vision, and 1M context? How do you take it from a first API call to production? How does Kimi K3 compare to the frontier on coding and agentic benchmarks? How much does Kimi K3 cost on Together AI? Kimi K3 is Moonshot AI's most capable model to date: a 2.8-trillion-parameter model and the world's first open-source model in the 3-trillion-parameter class. It is designed for frontier intelligence work like long-horizon coding, end-to-end knowledge work, and deep reasoning. It is also the first open-weights model competing at the GPT 5.6 Sol and Claude Fable 5 tier, and Together AI is working directly with the Moonshot team to serve it. The largest open-weight model released The Kimi team is deeply committed to scaling, and it shows: in nine of the twelve months from July 2025 to July 2026, Kimi models set the upper bound of open-model scale. At 2.8 trillion parameters, K3 is now the largest open-weight model ever released. Available now Run Kimi K3 on Together AI …

Announced

01 Aug 2026 00:00 UTC