Kimi K2 — Moonshot AI's Frontier Model on Chatly

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Kimi K2 Model’s Powerful Capabilities

Moonshot AI Kimi K2 is engineered to be smart, efficient, and deeply capable.

Huge Expert Network

Uses 384 “experts” but only activates a few at a time, giving huge knowledge without massive slowdowns.

Stable Training

Trained using the MuonClip optimizer, which prevents the training from becoming unstable even at massive scale.

Handles Long Texts

Can read and work with super long documents (up to 128,000 tokens), so nothing gets cut off.

Frequently Asked Questions

Still got questions? Learn more about how Kimi K2 operates.

Open-Source License

Released under a modified MIT license, meaning it’s free to use, adapt, and integrate for many kinds of projects.

Built for Action

Designed to call tools, run code, and make decisions — not just chat, but do.

Top Coding Skills

Performs very well on coding benchmarks, making it a great helper for programming.

Understands Multiple Languages

Trained with a massive dataset, so it handles many languages and domains smoothly.

Efficient Memory Use

Even with trillion-parameter model, it only uses about 32 billion per inference, making it cheaper to run.

Autonomous Problem Solving

Built to plan, evaluate, and act on complex tasks with minimal human help — ideal for multi-step workflows.

Kimi K2 AI Benchmark Performance & Features

Kimi K2 blends scale, reasoning prowess, and tool-enabled autonomy to extraordinary performance.

Trillion-Parameter Sparse Architecture

Kimi K2 employs a mixture-of-experts design with 1 trillion total parameters, but only activates ~32 billion per token via expert routing. This provides massive capacity without incurring the full inference cost, enabling deep knowledge.

Ultra-Long 128K Context Window

With a 128,000-token context length, the Kimi K2 model can process entire books, lengthy codebases, or multi-document conversations in a single pass. This makes it ideal for tasks that require sustained memory.

Agentic & Reasoning Performance

On key evaluations, Kimi K2 achieves 71.6% on SWE-bench (coding), 65.8% on agentic task benchmarks, and 53.7% on LiveCodeBench v6. Kimi K2 Thinking goes even further (44.9% on Humanity’s Last Exam).

Work with Massive Documents Easily

Feed Kimi K2 long text, huge reports, or extended conversations, and it will keep every detail in context. Thanks to its long-window memory, you don’t have to break up your work into smaller chunks.

Think Through Hard Problems

Ask Kimi K2 AI to tackle complex tasks, and it reasons step by step, even calling tools or APIs on its own. This means your questions receive solutions that involve planning, verification, and action.

Automate Smooth, Multi-Step Workflows

You get an AI partner that can run long, structured processes for you. Moonshot AI Kimi K2 can chain together dozens or even hundreds of actions, like retrieving data, analyzing it, and summarizing results — all without you micromanaging.

Kimi K2 — Moonshot AI’s Next-Gen Agentic Intelligence