> ## 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, language, and behavior in the GPT Chat Assistant — all within ChatGPT for Google Workspace in Google Sheets.

## What Are Custom Assistants?

Custom assistants let you give the AI a set of instructions it will follow in every chat response. Instead of repeating "always answer concisely" or "respond in Spanish" 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 data analysis and another for drafting reports.

## How to Create an Assistant

<Steps>
  <Step title="Open the add-in">
    Click **Extensions** → **ChatGPT for Google Workspace** → **🚀 Launch GPT** to open the sidebar.
  </Step>

  <Step title="Open Settings">
    Click the **Settings** icon (gear) in the top-right corner of the sidebar.
  </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 **Data Analyst** or **Formal Spanish**.
  </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 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 answer concisely. Use bullet points and avoid long paragraphs."
  </Card>

  <Card title="Output format" icon="table">
    "When suggesting formulas, always show the full formula and a one-line explanation."
  </Card>

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

  <Card title="Domain focus" icon="star">
    "You are a financial analyst. Frame all answers around budgeting and forecasting."
  </Card>
</Columns>

### More instruction examples

**Tone:**

* "Be concise. Prefer short, direct answers."
* "Explain your reasoning step by step before giving the final answer."

**Output and formatting:**

* "Always return results as a table when listing data."
* "When you suggest a Sheets formula, wrap it in backticks and explain each argument."

**Content rules:**

* "Assume the first row of any selected range is a header."
* "When analyzing data, always point out the top and bottom values."

**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 pre-built actions too?">
    Assistants apply to the **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 Sheets features" icon="table" href="/google-workspace/sheets">
    See all ChatGPT for Google Workspace features in Sheets.
  </Card>

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