Kimi K3Kimi K3 - the great latest Agentic Intelligence model for smart Reasoning - web, 3d, game
Kimi K3 Thinking is Moonshot AI's 2.8-trillion-parameter open-source flagship. It blends native vision, a 1M-token context window, and max-effort reasoning to plan, explore, and solve through hundreds of deliberate steps across coding, search, and complex problem-solving.
What is Kimi K3?
Kimi K3 is Moonshot AI's open-source flagship reasoning model with 2.8 trillion parameters. Built on a sparse mixture-of-experts architecture with Kimi Delta Attention (KDA), it delivers a 1M-token context window, native vision capabilities, and max-effort reasoning. As the largest openly licensed AI model, Kimi K3 competes head-to-head with DeepSeek and Claude while offering self-hosted deployment.
Total Parameters
A 2.8-trillion-parameter sparse MoE with 896 experts, activating just 16 per token for efficient, scalable inference.
Context Tokens
Up to 1M tokens on the Allegretto tier and above—enough to reason over entire codebases and long documents at once.
Architecture
Kimi Delta Attention: a hybrid linear-attention mechanism with attention residuals for long-context efficiency.
KDA: The Core Innovation Behind Kimi K3
Kimi Delta Attention (KDA) is a hybrid attention architecture purpose-built to unlock the full potential of long-context, deep-reasoning AI. It is not a minor tweak — it is a fundamental redesign of how the model manages attention at scale.
Beyond Quadratic Scaling
Standard full attention grows quadratically with sequence length, making 1M-token context prohibitively expensive. KDA uses a linear-complexity hybrid that keeps the cost of long sequences manageable while preserving the quality of full attention on the most relevant tokens.
Attention Residuals for Depth
KDA introduces attention residuals — a mechanism that preserves identity information across every layer of the transformer stack. This means the model can maintain coherent reasoning even at extreme depths, avoiding the 'lost in the middle' problem that plagues other long-context models.
Real-World Impact
In practice, KDA allows Kimi K3 to reason over entire codebases (100,000+ lines), complete legal contracts, and full-length books in a single prompt. Compared to softmax-only models, KDA reduces hallucination rates at long context by a wide margin and maintains retrieval accuracy even at 1M tokens.
Key Features of Kimi K3
Engineered around agentic intelligence and grounded reasoning, making it ideal for tasks that demand autonomous problem-solving, tool use, and long-context analysis.
Agentic Capabilities
Purpose-built for tool use, reasoning, and autonomous problem-solving. It explores multiple paths, calls external tools, and executes complex multi-step tasks end to end.
Native Vision
Visual understanding is built in from the ground up—not bolted on. Read charts, screenshots, documents, and diagrams alongside text in a single context.
Max-Effort Reasoning
Ships with reasoning_effort set to max. It plans, backtracks from dead ends, and verifies conclusions—delivering state-of-the-art results on coding and knowledge tasks.
Advanced Features
A deep look at the architecture, capabilities, and licensing that make Kimi K3 the leading open-source alternative to proprietary AI models.
Trillion-Scale MoE
2.8T total parameters across 896 experts for comprehensive knowledge across domains.
KDA Hybrid Attention
Kimi Delta Attention delivers efficient long-context reasoning with attention residuals.
Agentic Intelligence
Designed for autonomous action, tool use, and complex multi-step problem-solving.
Open Weights (MIT)
Full model weights released under a Modified MIT license for community use and development.
How to Use Kimi K3
Three ways to access the power of Kimi K3, from self-deployment to instant cloud access.
Self-Deploy Kimi K3
Kimi K3 is fully open-source under a Modified MIT license. If you have compatible hardware and deployment capability, you can download the model weights from GitHub or HuggingFace and deploy it on your own infrastructure.
Use Kimi Official API
For developers who want to integrate Kimi K3 into their applications, the official API is available at platform.moonshot.ai with comprehensive documentation and SDKs, billed at $3 in / $15 out per 1M tokens.
Use on kimik3.com
The easiest option. No deployment or API integration needed. Access Kimi K3 along with DeepSeek, Claude, GPT, Gemini, Qwen, and Grok all in one platform. New users get 3 free credits.
Simple Pricing
One-time payment. No subscriptions. No hidden fees.
Starter
A great fit for the average user.
One-Time Pay
- 400 credits, valid for 1 month
- Access to Kimi K3 + all major AI models
- 1M-token context & native vision
- Multi-language support
- Real-time conversation
Pro
Optimized for power users.
One-Time Pay
- 3,000 credits, valid for 6 months
- Everything in Starter, plus:
- Max-effort reasoning enabled
- Ultra-fast response speed
- Early access to beta features
- Lifetime updates
Ultimate
Ultimate AI for professionals.
One-Time Pay
- 6,000 credits, valid for 1 year
- Everything in Pro, plus:
- Priority compute & highest throughput
- Extended credit validity
- Early access to beta features
- Lifetime updates
Kimi API is billed separately at $3 / 1M input tokens and $15 / 1M output tokens, with cached input at just $0.30 / 1M. Mooncake serving keeps coding cache hit rates above 90%, cutting real input cost roughly 4×.
Frequently Asked Questions
Everything you need to know about Kimi K3.
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How to Install and Run Kimi K3 Locally: Complete Step-by-Step Guide 2026
Step-by-step guide to installing Kimi K3 locally on your own hardware. Learn hardware requirements, quantization options, and deployment with vLLM, Ollama, and llama.cpp.
Kimi K3 1M Token Context: Practical Applications and Use Cases
What can you do with 1 million tokens of context? Explore practical use cases for Kimi K3's massive 1M context window: codebase analysis, document review, legal analysis, and more.
Start Using Kimi K3 Today
Get 3 free credits to experience the power of open-source agentic intelligence. No credit card required.