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Kimi K3

Moonshot AI's Kimi K3 is a very large model that can read text, images and video, free to download for research and non-commercial use and aimed at long coding and knowledge-work tasks.

Release page →

The basics

Released

Jul 16
Apr 14, 2025

What it does

Text and chat: Writes, answers questions and holds a conversation.Thinks first: Can reason step by step before it answers: slower, but better at maths, code and tricky questions.Sees images: Understands pictures, screenshots and charts you share with it.Watches video: Understands video clips you share with it.
Text and chat: Writes, answers questions and holds a conversation.Code: Writes, explains and fixes code.Thinks first: Can reason step by step before it answers: slower, but better at maths, code and tricky questions.Sees images: Understands pictures, screenshots and charts you share with it.Reads files: Reads documents such as PDFs.

Knowledge cutoff

The latest events it learned about

Not published
April 2024

Download

FreeOpen weights, non-commercial licence
No: it runs on the maker's servers

Where to use it

Moonshot AI's app: Kimi ↗
OpenAI's app: ChatGPT ↗Also for developers, through an API

Price and limits, for developers

Input

Per million tokens

$3.00
$2.00Cheaper

Output

Per million tokens

$15.00
$8.00Cheaper

Cached input

Per million tokens

$0.30Cheaper
$0.50

Context window

How much it takes in at once

1.05M tokens about 790,000 wordsBigger
1.05M tokens about 790,000 words

Longest answer

Not listed
33K tokens about 25,000 words

How they score

Combined test score

Epoch Capabilities Index · Epoch AI

159#23 of 237Higher
136#130 of 237

Kimi K3 scores 22 points higher, a big step.

Chat answers, by people's votes

LMArena text, adjusted for style · LMArena

1,487#16 of 86
Not ranked

Only Kimi K3 is in this ranking, which lists the most-voted models.

Building apps, by people's votes

LMArena WebDev · LMArena

1,657#15 of 85
Not ranked

Only Kimi K3 is in this ranking, which lists the most-voted models.

Green marks the better of the two on each row, red the other. Rows where one side isn't listed, or where the gap is too close to call, stay plain.

Popular comparisons

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Rankings from LMArena and Epoch AI, both CC BY 4.0, updated . Developer prices, context windows and knowledge cutoffs from the labs' own listings on models.dev and from OpenRouter. The app links go to each maker's own app when no source says exactly where the model is available.

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