ChatGPT’s custom GPTs, now available as of December 2025, allow Australian businesses to create tailored versions of ChatGPT for specific tasks without needing coding experience. These customisations function as dedicated AI assistants trained on your provided data and instructions, accessible through the ChatGPT interface.
Currently, creating a custom GPT involves using the ‘Create a GPT’ option within ChatGPT Plus. You define its personality, instructions, and knowledge base by uploading files (like product manuals or training documents – up to 20MB per file) or linking to external websites. In 2026, OpenAI plans to increase the file upload limit to 100MB and introduce a team collaboration feature, allowing multiple users within an organisation to contribute to a single GPT. The GPT store, launched in late 2025, also allows businesses to monetise their custom GPTs if they choose, though Australian GST implications need consideration.
These custom GPTs can automate tasks like customer support responses, content drafting based on brand guidelines, or internal knowledge base searches. While the base ChatGPT model is hosted in US data centres, data privacy considerations for Australian businesses are addressed through OpenAI’s data usage policies and the ability to control the data used to train your custom GPT.
