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Specs

Model IDmoonshotai/kimi-k2-thinking
Context window262K tokens
Max output98K tokens
Input price$0.60 / 1M tokens
Output price$2.50 / 1M tokens
Inputs → outputsText → Text
Open weightsYes

How to use Kimi K2 Thinking in your app

The quickest way is through an API gateway such as OpenRouter, which uses the same format as the OpenAI API. Create a key, then send a request with the model ID moonshotai/kimi-k2-thinking:

curl https://openrouter.ai/api/v1/chat/completions \ -H "Authorization: Bearer $OPENROUTER_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "moonshotai/kimi-k2-thinking", "messages": [{"role": "user", "content": "Explain this in simple words..."}] }'

Prefer no code? Many tools in our AI tools directory run on models like this one.

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Questions about Kimi K2 Thinking

What is Kimi K2 Thinking?

Kimi K2 Thinking is Moonshot AI’s most advanced open reasoning model to date, extending the K2 series into agentic, long-horizon reasoning. Built on the trillion-parameter Mixture-of-Experts (MoE) architecture introduced in...

How big is the context window of Kimi K2 Thinking?

Kimi K2 Thinking can read up to 262,144 tokens in one request, roughly 196,608 words.

How much does Kimi K2 Thinking cost?

Through OpenRouter, Kimi K2 Thinking costs about $0.60 / 1M tokens for input and $2.50 / 1M tokens for output. Prices change, so check before large jobs.

Is Kimi K2 Thinking open source?

Kimi K2 Thinking has open weights, so you can download and run it yourself, subject to its licence.

What can Kimi K2 Thinking take as input?

Kimi K2 Thinking accepts text and produces text.

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Specs and prices come from OpenRouter and the provider, and are refreshed daily. Last checked 6 Nov 2025.

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