aider/aider/website/docs/llms/xai.md
2025-04-20 10:28:01 -07:00

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---
parent: Connecting to LLMs
nav_order: 400
---
# xAI
You'll need a [xAI API key](https://console.x.ai.).
First, install aider:
{% include install.md %}
Then configure your API keys:
```bash
export XAI_API_KEY=<key> # Mac/Linux
setx XAI_API_KEY <key> # Windows, restart shell after setx
```
Start working with aider and xAI on your codebase:
```bash
# Change directory into your codebase
cd /to/your/project
# Grok 3
aider --model xai/grok-3-beta
# Grok 3 fast (faster, more expensive)
aider --model xai/grok-3-fast-beta
# Grok 3 Mini
aider --model xai/grok-3-mini-beta
# Grok 3 Mini fast (faster, more expensive)
aider --model xai/grok-3-mini-fast-beta
# List models available from xAI
aider --list-models xai/
```
The Grok 3 Mini models support the `--reasoning-effort` flag.
See the [reasoning settings documentation](../config/reasoning.md) for details.
Example:
```bash
aider --model xai/grok-3-mini-beta --reasoning-effort high
```