Kimi K3 is the newest flagship model from Moonshot AI, released in July 2026. It is an open-weight multimodal reasoning model with 2.8 trillion parameters that accepts text, images, and video.

K3 is suited for complex coding, knowledge work, and long-horizon agentic workflows. It keeps the long-context focus Kimi is known for, with a context window of about 1 million tokens.

Complex Coding

Handle demanding programming tasks across large codebases.

Agentic Task Workflows

Plan and carry out long, multi-step tasks.

Deep Reasoning

Work through hard problems step by step.

Image and Video Understanding

Ask questions about images and video alongside text.

Long Document Context

Keep about 1M tokens in view - books, reports, or repositories.

Research and Knowledge Work

Analyze sources and write structured summaries and reports.

Open the chat

Click "Open Chat" to start chatting with Kimi for free.

Provide your input

Paste long texts or code, or describe your task.

Get a detailed answer

The model reasons through your request and replies.

Refine the result

Ask follow-ups to dig deeper.

Use the output

Copy the answer or code into your work.

Kimi K3 is Moonshot AI's newest flagship model, released in July 2026 - an open-weight multimodal reasoning model with 2.8 trillion parameters.

Kimi K3 is released with open weights, so developers can download and run it.

About 1 million tokens.

Yes. It accepts text, images, and video as input.

K3 is a much larger, multimodal model with a longer context window and stronger coding and agentic abilities.

Yes, the Kimi chat on chatai.org is free and requires no registration. There is a daily message limit.

Kimi K3: Moonshot's Open Reasoning Model

What is Kimi K3?

What Kimi K3 can do

How to use Kimi K3

Frequently Asked Questions