What is the context window of MoonshotAI: Kimi K2 Thinking?

MoonshotAI: Kimi K2 Thinking supports a context window of 262K tokens.

Is MoonshotAI: Kimi K2 Thinking free to use?

MoonshotAI: Kimi K2 Thinking is a paid model. It costs $0.600 per million input tokens and $2.50 per million output tokens.

How is LLM API pricing calculated?

LLM pricing has two components: input tokens (everything you send) and output tokens (what the model generates). Total cost = (prompt tokens × input rate + output tokens × output rate) / 1,000,000 × number of requests.

MoonshotAI: Kimi K2 Thinking API Pricing — $0.600 Input / $2.50 Output per 1M Tokens

Q: How much does MoonshotAI: Kimi K2 Thinking cost?

MoonshotAI: Kimi K2 Thinking costs $0.600 per million input tokens and $2.50 per million output tokens via OpenRouter. Pricing was last updated Oct 29, 2026.

MoonshotAI: Kimi K2 Thinking by Moonshotai — $0.600 input / $2.50 output per 1M tokens via OpenRouter. Context: 262K tokens. Pricing last updated Oct 29, 2026.

Input / 1M tokens

$0.600

Output / 1M tokens

$2.50

Provider

Moonshotai

Context window

262K tokens

Via

OpenRouter

Cost at common usage volumes

Usage	Daily	Monthly
Chatbot (100/day)	$0.343	$10.28
Small app (1K/day)	$1.85	$55.50
Mid-scale (10K/day)	$24.50	$735.00
Large scale (100K/day)	$550.00	$16500.00

Model ID: moonshotai/kimi-k2-thinking
Data source: OpenRouter public API — updated Oct 29, 2026.

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About MoonshotAI: Kimi K2 Thinking

MoonshotAI: Kimi K2 Thinking is an LLM developed by Moonshotai. Input costs $0.600 per million tokens and output costs $2.50 per million tokens via OpenRouter. It supports a context window of 262K tokens.

Pricing Details

Via the OpenRouter API:

Input tokens: $0.600 per 1 million tokens
Output tokens: $2.50 per 1 million tokens

A token is roughly 0.75 words. For context: a typical user message of 100 words is approximately 133 tokens; a 500-word system prompt is about 650 tokens.

How Much Does MoonshotAI: Kimi K2 Thinking Cost?

For a typical chatbot application (1,000 requests/day, 1,000 prompt tokens and 500 output tokens per request):

Daily cost: $1.8500
Monthly cost: $55.500

Accessing MoonshotAI: Kimi K2 Thinking via OpenRouter

OpenRouter provides a unified API for 200+ LLMs including MoonshotAI: Kimi K2 Thinking. You can use it with any OpenAI-compatible SDK by setting the base URL to https://openrouter.ai/api/v1 and using your OpenRouter API key. The model ID is moonshotai/kimi-k2-thinking.

Compare MoonshotAI: Kimi K2 Thinking with Other Models

Use the AI Model Cost Comparison tool to compare MoonshotAI: Kimi K2 Thinking against GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, or any other model side by side. Or use the LLM API Cost Calculator to browse all 456+ models sorted by cost for your specific usage.

Frequently Asked Questions

Yes. MoonshotAI: Kimi K2 Thinking is available on OpenRouter with the model ID moonshotai/kimi-k2-thinking. OpenRouter provides a unified API compatible with OpenAI's SDK format.