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What is Kimi K3?

Kimi K3 is Moonshot AI’s most advanced model, designed for high-end reasoning, software engineering, multimodal understanding, knowledge work, and agentic AI applications. The model has 2.8 trillion parameters and is built on Kimi Delta Attention, a hybrid linear attention mechanism created for long-context performance. It also uses Attention Residuals and supports a native context window of up to 1 million tokens. This makes Kimi K3 suitable for tasks involving large codebases, long research materials, enterprise documentation, multi-file analysis, legal documents, technical manuals, and complex workflows. Kimi K3 always has thinking mode enabled, with reasoning effort configured through the reasoning_effort field and maximum effort currently supported as the default. Developers can use the model through an OpenAI-compatible API, making it easier to integrate with existing SDKs, clients, and application infrastructure. The model supports streaming responses with separate reasoning and final-answer deltas, allowing applications to display reasoning progress and final content differently. Kimi K3 also supports strict structured output with JSON Schema, partial mode for continuing from a prefix, custom tool calling, required tool use, and dynamic tool loading through system messages. Its vision capabilities support image and video inputs through base64 or uploaded files, enabling analysis of visual content alongside text. Automatic context caching helps workflows that reuse long prefixes, such as large knowledge bases or persistent system context, without requiring developers to manage cache IDs manually. By combining frontier-scale parameters, long-context processing, visual input, structured outputs, tool orchestration, and developer-friendly API compatibility, Kimi K3 gives teams a strong foundation for advanced AI agents, coding assistants, research systems, enterprise automation, and multimodal applications.

What is Kimi?

Kimi serves as an exceptionally skilled assistant, boasting a remarkable "memory" that enables her to simultaneously read extensive novels of up to 200,000 words while browsing the web. Her ability to grasp and analyze lengthy documents proves invaluable for swiftly summarizing reports like financial analyses and research findings, which enhances both your reading efficiency and organizational tasks. When preparing for exams or exploring unfamiliar topics, Kimi adeptly summarizes and clarifies intricate details from textbooks or academic articles, making learning more accessible. For those involved in programming or technical endeavors, Kimi is ready to assist by reproducing code or proposing technical solutions based on your provided snippets or pseudocode. Fluent in Chinese and adept at handling multilingual content, Kimi greatly improves communication and comprehension in international environments, establishing her as a versatile asset for global collaboration. Beyond her practical applications, Kimi Chat can engage users in lively conversations or even take on the persona of beloved game characters, adding an entertaining dimension to the experience. This blend of productivity help and interactive enjoyment not only aids in completing tasks but also infuses a sense of fun into your everyday activities, making Kimi an indispensable part of your routine.

Media

Media

Integrations Supported

Brokk
Kimi Work
Nebius Token Factory
Novita AI
OpenClaw
Pi Agent
CSS
Cherry Studio
Grengin
Kotlin
Lua
Okara
OpenAI Codex
OpenTag
Shiori

Integrations Supported

Brokk
Kimi Work
Nebius Token Factory
Novita AI
OpenClaw
Pi Agent
BLACKBOX AI
Kimi K2.6
Kimi K3
OpenWorker
omp

API Availability

Has API

API Availability

Has API

Pricing Information

$3 per 1M tokens (input)
Kimi K3 is priced per 1 million tokens:

Cached input: $0.30
Uncached input: $3.00
Output: $15.00
Context window: 1,048,576 tokens

Cached inputs cost 90% less than uncached inputs, while generated output is the most expensive token category. Prices exclude applicable taxes, which are calculated based on the customer’s jurisdiction.

Pricing Information

Free
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Moonshot AI

Date Founded

2023

Company Location

China

Company Website

kimi.ai

Company Facts

Organization Name

Moonshot AI

Date Founded

2023

Company Location

China

Company Website

www.kimi.com

Categories and Features

AI Coding Models

Not specified

AI Models

Not specified

AI Reasoning Models

Not specified

Foundation Models

Not specified

Large Language Models

Not specified

Open-Weight AI Models

Not specified

Categories and Features

AI Assistants

Not specified

AI Chatbots

Not specified

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