# Grok 4.3

> Grok 4.3 on Clonvo: 1M context, $1.25 input and $2.50 output per 1M tokens.

xAI's flagship reasoning model with 1M context, vision, and tool support.

-   Model id: `x-ai/grok-4-3`
-   Provider: xAI
-   Released: Apr 30, 2026
-   Context: 1M tokens
-   Max output: not published

## 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) | $1.25 | per 1M tokens |
| Output (completion) | $2.50 | per 1M tokens |
| Cache read | $0.20 | per 1M tokens |

### Prices by prompt length

The tier is chosen by the number of prompt tokens in the request. USD per 1M tokens.

| Charge | Up to 200K | Over 200K |
| --- | --- | --- |
| Input (prompt) | $1.25 | $2.50 |
| Output (completion) | $2.50 | $5.00 |
| Cache read | $0.20 | $0.40 |

## Capabilities

-   Tools
-   Vision
-   Reasoning

### Reasoning efforts

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

-   `none`
-   `low`
-   `medium`
-   `high`

### Supported parameters

Upstream parameters this model honours. Others may be ignored.

-   `temperature`
-   `max_tokens`
-   `top_p`
-   `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="x-ai/grok-4-3",
    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 xAI, whose API terms govern how they handle your data: [xAI data policy](https://x.ai/legal/privacy-policy). Clonvo doesn’t store prompts or responses unless your organization turns on retention.

## Bring your own key

From Pay as you go up, a xAI 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).