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Moonshot AIOpen weights, long-horizon

Kimi K3

Moonshot AI's open-weight model for long coding, research and document work.

Made on Runable

Each clip is one prompt, run as a single Runable task.

Kimi K3 on Runable

  • Long sessions

    Made for long coding and research jobs with little hand-holding.

  • Reads your files

    Hand it PDFs, spreadsheets and screenshots.

  • No Moonshot account

    Runs on your Runable credits, next to other models.

How to use Kimi K3 on Runable

  1. Select Kimi K3

    Start a task on Runable and pick Kimi K3 in the model menu.

  2. Describe the job

    Type what you need, or add files and links. Runable plans it and gets to work.

  3. Get the finished work

    Refine by chatting, then publish the website, download the video or export the deck.

One prompt, finished work

Real results from single Runable tasks. Pick one to watch it.

Made on Runable
Build an award-winning single-page site for an environmental nonprofit called Verdant: an animated 3D Earth hero, live stats, and scroll-triggered animations.
token context window
1M
parameters, open weights
2.8T
SWE Marathon, Moonshot-reported
42.0
turn to build
Your

Why choose Kimi K3

  • Open frontier weights

    2.8T parameters, with weights on Hugging Face.

  • Long engineering runs

    42.0 on SWE Marathon, top of Moonshot’s launch table.

  • Business workflows

    30.8 on AutomationBench, also top of that table.

  • Huge context

    1M tokens for codebases, reports and long PDFs.

  • Sees what it builds

    Native vision lets it check screenshots as it works.

  • Lower cost per task

    $2.00 per Artificial Analysis task, against $5.46 for Sonnet 5.5.

Kimi K3 specs

Maker
Moonshot AI
Model
Kimi K3 (followed by Kimi K3.1 Pro in October 2026)
Released
July 16, 2026
API model ID
kimi-k3
Context window
1M tokens
Max output
131K tokens by default (up to 1M on Kimi’s API)
Input / output
Text and images in, text out
Reasoning
Always on; effort low, high or max (default max)
Architecture
Mixture-of-experts, 2.8T total / 104B active parameters
API price
$3 input / $15 output per 1M tokens ($0.30 cached input)
Weights are open under the Kimi K3 License, which adds terms for very large commercial users. API prices are Moonshot’s list prices; on Runable you use your plan’s credits instead.

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Kimi K3 FAQs

Kimi K3 is Moonshot AI’s 2.8-trillion-parameter model, released on July 16, 2026. It has native vision and a 1M-token context window, and Moonshot built it for long-horizon coding, knowledge work and reasoning.

Sources: Moonshot AI: Kimi K3 tech blog · Kimi API docs: Kimi K3 · Hugging Face: moonshotai/Kimi-K3 · Moonshot AI: Kimi K3.1 Pro tech blog · Artificial Analysis: Kimi K3 · Artificial Analysis: Kimi K3.1 Pro · Artificial Analysis: Claude Sonnet 5.5

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Put Kimi K3 to work

Describe the job. Runable runs it on Kimi K3 and ships the result.