Using a Custom GPT in ThreoAI

Overview

Custom GPTs are AI assistants built with a specific purpose, persona, and knowledge base. They behave like a regular ThreoAI chat but are tuned to a particular role — such as a policy assistant, IT support helper, or document reviewer. You can use GPTs you’ve created yourself or ones shared with you by your organization.

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Finding a Custom GPT

From My GPTs

1. In the left sidebar, click My GPTs at the bottom of the My GPTs section (or navigate to #/my-gpts)
2. Your GPT list shows all GPTs you’ve created plus any shared with you
3. Click a GPT card to open it and start a conversation

From the Marketplace

GPTs shared organization-wide by your admin appear in the Marketplace alongside AI Agents.

1. Click Explore Marketplace in the sidebar (or navigate to #/marketplace)
2. Use the Custom GPTs filter tab to browse GPTs only
3. Click any GPT card to open it

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Starting a Conversation with a GPT

When you open a Custom GPT:

• The GPT’s name and icon appear at the top of the chat
• Any Conversation Starters configured by the GPT’s creator appear as suggested prompts — click one to send it immediately, or type your own message
• The GPT responds according to its custom instructions, persona, and knowledge base

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Getting the Best Results

Custom GPTs are designed for specific use cases. To get the most accurate and useful responses:

• Use the conversation starters if they’re present — they’re designed to show you what the GPT does best
• Stay on topic — a GPT built for HR policy questions will perform best when asked HR-related questions
• Provide context — if the GPT has a knowledge base, reference specific documents or topics: “Based on the onboarding guide, what is the process for requesting equipment?”
• Attach files — you can still attach files to GPT conversations the same way you would in a regular chat

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Switching Models Within a GPT Chat

The model selector in the top-right still works within a GPT conversation. Switching models will use the GPT’s same custom instructions but with a different underlying AI model — useful if you want to compare how different models interpret the GPT’s persona.

Note: The GPT creator may have set a preferred model in the Advanced tab. Switching models overrides this for your current session only.

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Related

• Creating a Custom GPT — build your own Custom GPT
• Sharing a Custom GPT — make a GPT available to other users
• Agents & Marketplace — find AI Agents and shared GPTs