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 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 (up to 20MB per file – supporting PDF, TXT, CSV) or providing specific knowledge directly within the GPT builder. In 2026, OpenAI plans to increase the file upload limit to 100MB and introduce team collaboration features for GPT development, allowing multiple users within an organisation to contribute. Australian businesses can utilise this to train a GPT on product manuals, internal policies, or customer service scripts.
Access to custom GPTs requires a ChatGPT Plus subscription, which is priced at AUD $30 per month in Australia as of December 2025. While the core ChatGPT model is hosted in US data centres, OpenAI assures data privacy compliance with international standards, including those relevant to Australian businesses. Effectively, custom GPTs offer a low-code way to build bespoke AI tools for internal processes or customer-facing applications.
