# Kimi K3.1 Pro

> Kimi K3.1 Pro on Clonvo: 1.05M context, $2.00 input and $10.00 output per 1M tokens.

Kimi's flagship reasoning model with always-on thinking, vision input, tool calling, and a 1M-token context window.

-   Model id: `moonshotai/kimi-k3.1-pro`
-   Provider: Moonshot AI (Kimi)
-   Released: Oct 23, 2026
-   Context: 1.05M tokens
-   Max output: 1.05M tokens

## Pricing

The provider’s list price in USD. Requests on credits are charged exactly this; each response reports its cost in usage.cost.

| Charge | Price | Unit |
| --- | --- | --- |
| Input (prompt) | $2.00 | per 1M tokens |
| Output (completion) | $10.00 | per 1M tokens |
| Cache read | $0.20 | per 1M tokens |
| Cache write | $2.00 | per 1M tokens |
| Cache write (1 hour) | $4.00 | per 1M tokens |

## Capabilities

-   Tools
-   Vision
-   Reasoning
-   Structured outputs

### Reasoning efforts

Values accepted for `reasoning_effort` or `reasoning.effort`:

-   `low`
-   `high`
-   `max`

### Supported parameters

Upstream parameters this model honours. Others may be ignored.

-   `max_tokens`
-   `response_format`
-   `tools`
-   `tool_choice`
-   `reasoning_effort`

## Quick start

Use the OpenAI SDK with Clonvo’s base URL and this model id.

```python
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.clonvo.com/v1",
    api_key=os.environ["CLONVO_API_KEY"],
)

completion = client.chat.completions.create(
    model="moonshotai/kimi-k3.1-pro",
    messages=[{"role": "user", "content": "Summarise the plot of Hamlet in one sentence."}],
)
print(completion.choices[0].message.content)
```

## Data policy

Requests to this model are sent to Moonshot AI (Kimi), whose API terms govern how they handle your data: [Moonshot AI (Kimi) data policy](https://platform.moonshot.ai/docs/agreement/userprivacy). Clonvo doesn’t store prompts or responses unless your organization turns on retention.

## Bring your own key

From Pay as you go up, a Moonshot AI (Kimi) key added under Provider keys is used for this model before your credits: $25,000 a month free, then 4% of list price. [How bring-your-own-key works](https://clonvo.com/docs/byok.md).