Kimi K3

Name: Kimi K3
Author: Moonshot AI

Kimi K3 is a 2.8T-parameter model built on Kimi Delta Attention and Attention Residuals, with native vision capabilities and a 1-million-token context window — the world's first open 3T-class model.

Model page

View on models.dev

View on OpenRouter

Specs

Model

Family: Kimi
Variant: K3
Weights: Open
License: Kimi K3

Limits

Context: 1,048,576 tokens
Max output: 131,072 tokens

Modalities

Input: Text Image Video
Output: Text

Pricing

Input: $3 / 1M
Output: $15 / 1M
Cache read: $0.3 / 1M

Capabilities

Reasoning: Yes
Reasoning control: On / off, Effort levels
Tool calling: Yes
Attachments: Yes

Dates

Released: 16 Jul 2026

Articles

All articles

14 Aug 2026

Measuring Autonomous AI Research

We ran 153 autonomous runs across 18 frontier models on the nanoGPT optimizer speedrun.

Elie Bakouch

primeintellect.ai

27 Jul 2026

Kimi K3: Open Frontier Intelligence

Kimi K3 is the world's first open 3T-class model — frontier performance across coding, knowledge work, and reasoning, with native multimodality and 1M context.

Kimi

kimi.com

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