ChatGPT does not have a specific font as it is an AI language model that generates text responses. The font used to display the generated text depends on the platform or application you are using to interact with ChatGPT.

When you integrate ChatGPT into a web application, you can control the font style by using HTML and CSS. Here's an example of how you can set the font style using HTML tags:

<p style="font-family: Arial, sans-serif;">This is a sample text using Arial font.</p>```

In the above example, the `<p>` tag represents a paragraph, and the `style` attribute is used to define the CSS properties. The `font-family` property specifies the font to be used. In this case, Arial is set as the preferred font, followed by a generic sans-serif font as a fallback.

You can replace "Arial, sans-serif" with any other font name or a list of font names to prioritize different fonts. If the first font is not available, the browser will try to use the next font in the list.

It's important to note that the availability of specific fonts depends on the user's device and operating system. To ensure consistent font rendering across different platforms, it's recommended to use web-safe fonts or include custom font files using `@font-face` rule.

References:
- CSS font-family property: [MDN Web Docs](https://developer.mozilla.org/en-US/docs/Web/CSS/font-family)
- Web-safe fonts: [CSS Font Stack](https://www.cssfontstack.com/)