Kimi K3: the Complete Developer Guide
Kimi K3 is the first open 3T-class model.
See how it benchmarks, what it costs, and how to call it on the Together AI API, with copy-paste code examples.
Why It Matters
Moonshot AI's Kimi K3 pushes open-weight models into the 3-trillion-parameter scale, bringing frontier reasoning and high-sparsity MoE architectures to open access.
Implications
- Activating just 16 of 896 experts (2% sparsity) introduces critical routing and optimization requirements for 2.8T scale training.
- Together AI's API deployment enables explicit control over reasoning traces, schema constraints, and tool execution.
Strategic Outlook
Open-weight models approaching 3 trillion parameters are challenging closed-source performance leads across complex workflows.
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