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Moonshot AI Launches Kimi K3, a 2.8-Trillion-Parameter Open-Weight Model, With Native Vision and Agent Focus

July 16, 2026 at 13:36 EDT

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Open Source
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Moonshot AI has released Kimi K3, a 2.8-trillion-parameter open-weight model built for coding, long-horizon agent work and research, and has made it available for testing on the design benchmarking platform Design Arena. The flagship model debuted alongside a formal launch on the company's developer platform, where it is already accessible through the Kimi app, web interface and API.

Moonshot AI · Model Launch

Kimi K3: a 2.8-trillion-parameter open-weight model built for coding and agents

Moonshot's new flagship pairs native visual understanding with a one-million-token context window and "agent swarm" coordination — released open-weight and already on the leaderboards.

2.8T

Parameters, up from a rumored 2.5T

Token context window

Early GDPval-AA v2 placement

Open

Weights slated to release shortly

Pricing per million tokens

A step up from K2.6 — output tokens cost 5× input.

$0.30

Cache-hit

$3.00

Input

$15.00

Output

Promotion: up to 30% voucher on top-ups.

An aggressive release cadence, climbing the boards

K2.5 · January

→

K2.6 · April

→

K3 · now

Each step climbed the design leaderboards — especially in 3D design — now competing with Opus 4.5, GPT-5.6 and Gemini 3.

Positive reception

Polished one-shot coding & UI outputs
Strong detail control and visual reasoning
Front-end evals rate it on par with top rivals

Concerns raised

Pre-release builds could feel slow
Prone to overthinking
Token efficiency needs work; API-only for now

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