> ## Documentation Index
> Fetch the complete documentation index at: https://help.coregptapps.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Custom AI Assistants

> Create custom AI assistants with your own instructions to control tone, sign-off, language, and behavior in the AI Chat — all within CoreGPT AI for Word.

## What Are Custom Assistants?

Custom assistants let you give the AI a set of instructions it will follow in every AI Chat response. Instead of repeating "always write formally" or "match our brand voice" in each message, you write those instructions once in an assistant, activate it, and the AI behaves that way automatically.

You can create multiple assistants and switch between them — for example one for formal contracts and another for casual blog drafts.

## How to Create an Assistant

<Steps>
  <Step title="Open Settings">
    Click the **Settings** icon (gear) in the top-right corner of the add-in.
  </Step>

  <Step title="Open the Assistants page">
    Scroll to the **Assistants** row and click **Manage**.
  </Step>

  <Step title="Create a new assistant">
    Click **Create assistant** at the top of the page.
  </Step>

  <Step title="Give it a name">
    Enter a short name that describes its purpose — for example **Legal Formal** or **Marketing Voice**.
  </Step>

  <Step title="Write your instructions">
    In the **Instructions** field, describe how the AI should behave. Be as specific as you need — see the examples below.
  </Step>

  <Step title="Save">
    Click **Save**. The assistant is now created and set as active.
  </Step>
</Steps>

## How to Switch Between Assistants

Switching is done from the same **Assistants** page where you manage them.

1. Open **Settings** → **Assistants** → **Manage**.
2. Tap any assistant in the list to make it active — a checkmark appears next to the active one.
3. Tap the active assistant again to deselect it and go back to **Default** (no custom instructions).
4. To switch to a different assistant, simply tap another one.

The active assistant is remembered across sessions. Every AI Chat message you send will use its instructions until you change it.

## Editing and Deleting Assistants

On the **Assistants** page:

* Click the **pencil icon** next to an assistant to edit its name or instructions.
* Click the **trash icon** to delete it. You will be asked to confirm before it is removed.

## Writing Effective Instructions

Instructions tell the AI exactly how to behave. The clearer and more specific they are, the better the results.

<Columns cols={2}>
  <Card title="Tone and style" icon="sliders">
    "Always write in a formal, professional tone. Avoid contractions and casual language."
  </Card>

  <Card title="Structure" icon="pen-line">
    "Organize long answers with clear headings and short paragraphs."
  </Card>

  <Card title="Language" icon="globe">
    "Always respond in Spanish, regardless of the language of my request."
  </Card>

  <Card title="Brand voice" icon="star">
    "Write in a friendly, approachable tone. Use short sentences. Never use jargon."
  </Card>
</Columns>

### More instruction examples

**Tone:**

* "Use a warm but professional tone in all responses."
* "Be concise. Aim for short paragraphs unless more detail is needed."
* "Avoid using passive voice."

**Style and structure:**

* "Always start drafts with a one-sentence summary, then the full text."
* "Use British English spelling throughout."

**Content rules:**

* "Never invent statistics or sources. If unsure, say so."
* "When rewriting, preserve the original meaning and keep roughly the same length."

**Language:**

* "Respond in French. Maintain a professional register."
* "Translate all summaries into Japanese."

## Frequently Asked Questions

<AccordionGroup>
  <Accordion title="How many assistants can I create?">
    There is no fixed limit — you can create as many assistants as you need.
  </Accordion>

  <Accordion title="Can I have more than one assistant active at a time?">
    No, only one assistant is active at a time. To switch, tap a different assistant in the list. To use no custom instructions, tap the active assistant again to deselect it.
  </Accordion>

  <Accordion title="What happens if I delete the active assistant?">
    The active assistant is automatically cleared and the AI reverts to **Default** behavior.
  </Accordion>

  <Accordion title="Do assistants apply to all features or just chat?">
    Assistants apply to the **AI Chat**. The instructions you write are passed to the AI alongside your message every time you send a chat request.
  </Accordion>

  <Accordion title="Is there a limit on instruction length?">
    Yes — instructions can be up to **2,000 characters**. The character count is shown below the input field as you type.
  </Accordion>
</AccordionGroup>

## Next Steps

<Columns cols={2}>
  <Card title="Back to Word features" icon="file-lines" href="/microsoft-365/word">
    See all CoreGPT AI for Word features.
  </Card>

  <Card title="Get help" icon="question" href="/help-support/faq">
    Find answers to common questions.
  </Card>
</Columns>