> ## Documentation Index
> Fetch the complete documentation index at: https://craft-support.mintlify.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Choosing AI Models

> Select the right AI model for speed, capability, and AI usage based on your task.

Craft offers several AI models with different strengths. Choosing the right one helps you manage AI usage and match the model to the size and complexity of your task.

## How to switch models

You can change the model at any time from inside the Assistant panel.

<Steps>
  <Step title="Open the Assistant panel">
    Open the Assistant from any document or Space view.
  </Step>

  <Step title="Tap the Assistant button">
    Below the input field, tap the **Assistant button**.
  </Step>

  <Step title="Select Model">
    Choose **Model** from the popup, then pick the model you want to use.
  </Step>
</Steps>

<Frame>
  <img src="https://mintcdn.com/craft-support/clowX4OGjSAs21Wo/images/ai-assistant/models/en/content/model-selector-entry.png?fit=max&auto=format&n=clowX4OGjSAs21Wo&q=85&s=3dd520bd49b396cb8a17c431a4c18c07" alt="Assistant panel showing the Assistant button and Model option in the popup" width="1190" height="754" data-path="images/ai-assistant/models/en/content/model-selector-entry.png" />
</Frame>

## Model comparison

| Model    | Usage  | Best for                                                     | Conversations   | Editing |
| -------- | ------ | ------------------------------------------------------------ | --------------- | ------- |
| **Max**  | High   | Complex reasoning, multi-document work, long summaries       | Multi-turn      | Yes     |
| **Fast** | Medium | Space-level questions, deeper analysis, longer conversations | Multi-turn      | Yes     |
| **Core** | Low    | Everyday in-document queries, balanced performance           | Single response | No      |

The **Core** tier groups several models you can choose between:

| Core model             | Processing | Conversations   | Availability      |
| ---------------------- | ---------- | --------------- | ----------------- |
| GPT-5 Nano             | Cloud      | Single response | All platforms     |
| Apple Foundation Model | On-device  | Multi-turn      | Mac, iPad, iPhone |
| LLaMa 3.2              | On-device  | Single response | Mac, iPad, iPhone |

<Info>
  On-device models process everything locally on your device — no data is sent to external servers. They don't count toward your AI usage but are only available at document level.
</Info>

<Info>
  Apple Foundation Model requires [Apple Intelligence](https://support.apple.com/en-us/111901) to be enabled in System Settings.
</Info>

## When to choose each model

### Core

The default tier for most everyday tasks. Use for in-document questions, quick summaries, and simple transformations.

* On-device models don't count toward your AI usage; GPT-5 Nano uses a low amount
* **Apple Foundation Model** supports back-and-forth conversations and runs entirely on-device — a good choice for iterating on a question privately
* **GPT-5 Nano** and **LLaMa 3.2** give a single response per conversation
* Read-only — no document editing

### Fast

Use for space-level queries and quick edits.

* Good balance of speed and quality
* Supports editing on supported platforms
* Works well for short to medium editing tasks

### Max

Use for complex reasoning and high-quality editing.

* Best output quality for large or structured edits
* Best for advanced multi-document analysis
* Supports editing on supported platforms

## Platform differences

All cloud models (Max, Fast, GPT-5 Nano) are available on every platform — macOS, iOS, Windows, and Web.

On-device models (Apple Foundation Model, LLaMa 3.2) are available on **Mac, iPad, and iPhone** only. Editing with the Assistant is currently supported on **macOS and iOS** — see [Editing with Craft Assistant](/en/ai-assistant/editing) for details.

## Related Articles

<CardGroup cols={2}>
  <Card title="Using Craft Assistant" href="/en/ai-assistant/using">
    Learn how to start conversations and work with the Assistant
  </Card>

  <Card title="Editing with Craft Assistant" href="/en/ai-assistant/editing">
    See what editing can do and how modes work
  </Card>

  <Card title="Usage & Limits" href="/en/ai-assistant/usage">
    Understand AI usage and top-up options
  </Card>
</CardGroup>