MoE architecture

Kimi MoE Model Explained

Understand Kimi K3 as a Mixture-of-Experts model: total parameters, activated parameters, experts, routing, context, and hardware implications.

Mixture-of-Experts routing diagram for Kimi K3
Referencereading path
Kimi K3frontier example
6source links
2026-07-29updated

Kimi K3 MoE terms

TermKimi K3 valuePlain meaning
Total parameters2.8TFull model scale
Activated parameters104BApproximate active portion per token
Experts896Specialized parameter groups
Selected experts per token16Experts routed for each token
Context length1,048,576 tokensMaximum listed context window

Plain answer

Kimi K3 uses a Mixture-of-Experts architecture. Official materials list 896 experts, 16 selected experts per token, 2 shared experts, and 104B activated parameters out of 2.8T total parameters.

MoE improves efficiency because only part of the model is active for a token, but it does not make the full model small. The system still needs access to the full expert set.

Decision checklist

Use this section to keep the next step practical before you touch accounts, files, infrastructure, or hardware.

CheckLook forWhy it matters
Read the official sourceStart with the model card, help center, docs, or official product page before trusting summaries.Model names, limits, and prices change.
Name the pathDecide whether you need a hosted app, API call, local client, or full self-managed deployment.Different paths have different costs and account boundaries.
Check the boundaryKeep login, payment, API keys, private files, and account settings on the official surface.A public guide should help you choose, not handle sensitive actions.
Keep evidenceSave the source link, date, version, and practical next step that shaped your decision.This makes later review easier for a team.

How to read the facts

Sparse routing

Each token is routed through selected experts rather than every expert, which changes compute cost per token.

Shared experts

Shared experts provide common capacity alongside routed experts.

Hardware implication

The full expert set still has to be stored, so deployment planning remains memory-heavy.

Quick scan cards

Total parameters

2.8T Full model scale

Activated parameters

104B Approximate active portion per token

Experts

896 Specialized parameter groups

Selected experts per token

16 Experts routed for each token

Context length

1,048,576 tokens Maximum listed context window

FAQ

What does MoE mean for Kimi K3?

It means Kimi K3 routes each token through selected experts instead of activating the entire model.

Does MoE reduce storage needs?

No. It reduces active compute per token, but the full expert set still needs to be stored.

Why does MoE matter for self-hosting?

Routing across experts can make interconnect and serving software as important as raw VRAM.

Further reading