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Moonshot

Kimi K3 API

Moonshot's frontier model — long-context reasoning and agentic tool use.

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Starting at

$3.15

input price per 1M tokens

3 token price options

Kimi K3 playground

Input

openai
2048
1.0
1.00

Input

$3.15 / 1M

Output

$15.75 / 1M

Output

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Ask Kimi K3 anything. Messages are sent directly to the API and charged by token usage.

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Kimi K3 API pricing

OptionPrice per 1M tokens
input$3.15
output$15.75
cacheRead$0.315

Quick start

Full API reference →
1curl -X POST https://api.api-stock.com/api/v1/chat/completions \
2  -H "Authorization: Bearer $API_STOCK_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{
5    "model": "kimi-k3",
6    "messages": [
7      {
8        "role": "user",
9        "content": "A cinematic shot of a city at dusk"
10      }
11    ]
12  }'

Frequently asked questions

How much does Kimi K3 cost?

Kimi K3 starts at $3.15 per 1M input tokens through the API Stock API. You pay per use from a single prepaid balance — there is no subscription — and the final price scales with parameters such as resolution or duration.

When was Kimi K3 released?

Kimi K3 was released on July 16, 2026. It is available through the API Stock API with the same key and prepaid balance as every other model.

How do I get an API key for Kimi K3?

Sign up for API Stock, top up your balance by any amount and create an API key in the dashboard — it takes a couple of minutes and needs no contract. The same key works with every model in the catalog, so there is no separate key to obtain for Kimi K3.

How do I call the Kimi K3 API?

Send a POST request to https://api.api-stock.com/api/v1/chat/completions with your API key and the model "kimi-k3", using the openai-compatible request format shown in the quick start above.

What happens if a Kimi K3 request fails?

API Stock automatically retries the request on a reserve provider. If every provider fails, the charge is refunded to your balance.

Can I use Kimi K3 with the same API key as other models?

Yes. Every model on API Stock — video, image, music and chat — shares one API key and one prepaid balance, so you can switch to Kimi K3 without new credentials.

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