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Kimi K3.1 Pro
Moonshot AI · kimi-k3.1-pro
Moonshot's flagship Kimi model for coding (full-project, game and web builds), 3D/CAD scripting, financial workflows and agentic work; text, image and video input, always-on thinking, 1M context.
Starting price
543,800
per million tokens
Billing
Pay as you go
Service status
Active
Released
2026
About Kimi K3.1 Pro
Moonshot's flagship Kimi model for coding (full-project, game and web builds), 3D/CAD scripting, financial workflows and agentic work; text, image and video input, always-on thinking, 1M context.
Kimi K3.1 Pro pricing
Input
543,800
Output
2,719,000
Cache (read)
54,380
Cache (write)
543,800
Model id
Provider
Context window
Max output tokens
Inputs
Outputs
Billing basis
Status
Released
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Sample code and API for Kimi K3.1 Pro
Point the base URL at CupAI and use your own API key; the rest of the request stays exactly as it is in any compatible client.
View the model documentationcurl 'https://api.cupai.ir/v1/chat/completions' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer $CUPAI_API_KEY' \
-d '{
"model": "kimi-k3.1-pro",
"messages": [
{
"role": "user",
"content": "Hello!"
}
]
}'Replace CUPAI_API_KEY with your own key.
Create an API key
Capabilities
Capabilities supported by this model's API.
text-to-text
image-to-text
video-to-text
Frequently asked questions about Kimi K3.1 Pro
- How is usage of Kimi K3.1 Pro billed?
- By the input and output tokens of each request. The rate for each part is in the pricing table on this page, and the amount is deducted from your wallet.
- How do I connect to Kimi K3.1 Pro?
- Point the base URL at CupAI, put your API key in the request header, and send the model id in the request body. Ready-made samples are on this page.
- How do payments work?
- Payments are in Toman and need no foreign credit card. Credit you buy can be spent on any available model.
Other models
How model pricing works
Every AI model strikes a different balance between speed, answer quality and cost. Flagship models suit complex reasoning, long-document analysis and precise code generation, while lighter models cost considerably less for summarising, classification and short answers. The list above shows each model's rate broken down by input token, output token and cache, so you can estimate the cost of your workload before you start.
A token is the smallest unit of text a model processes; roughly speaking a thousand tokens is about 750 English words. The cost of a request is the sum of its input and output tokens, so shortening your prompt and capping the response length reduces cost directly. Some models have a second price tier for very long inputs, which reprices the entire request once it crosses a stated threshold.