# Model settings

**1. What exactly are models, and what do they do?**\
Models are the backbone of AI chat systems. Every moment you interact with is essentially powered by an underlying AI model playing that role. Switching models is like swapping out actors—different models have varying capabilities. Generally, smarter models (like GPT-4 vs. GPT-3) deliver better role-playing performance.

**2. How do I switch models?**

* Go to the homepage and open any character card.
* Tap the **+** icon in the bottom-left corner.
* Select **"Choose Model"** to pick your preferred AI engine.

<figure><img src="/files/Aliem5nV2CthYsazpO8a" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/wHbi5q2EDNXTqM5bI2B1" alt=""><figcaption></figcaption></figure>

#### 3. What models do we have?

We have models from claude, gemini, deepseek and many more.&#x20;

#### 4. What is the difference between Rubii+ FREE and Rubii+ EXCLUSIVE models?&#x20;

Rubii+ FREE models are models that are free to use for all Rubii+ members.

Rubii+ EXCLUSIVE models are premium models that only Rubii+ members can use, which costs ruby when using it.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://rubii.gitbook.io/rubii-tutorials-for-ai-chat/chat-settings/model-settings.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.