OpenAI opened its first Australian office in Sydney in December 2025 after months of active courtship from the NSW government. The pitch to OpenAI included the fact that Sydney holds 65% of all venture capital in Australia and is home to Atlassian, Canva, and Afterpay. It worked.
Australia is now one of OpenAI's top ten markets for both paying subscribers and developers. Weekly active ChatGPT users in Australia grew 2.5 times in a single year. Commonwealth Bank signed a multi-year partnership to use OpenAI tools for fraud detection. Coles deployed AI tools to its corporate teams. La Trobe University is rolling out ChatGPT to all staff and students. The Sydney office is OpenAI's third in Asia-Pacific, after Singapore and Tokyo, and it signals a long-term commitment to the region.
Beyond the office, OpenAI signed a deal with Australian data centre operator NEXTDC to build a large AI computing campus in Western Sydney, with OpenAI as the first major customer of a facility expected to cost around AU$7 billion. This is where the story gets complicated.
The scale of data centre investment pouring into NSW is genuinely large. AWS committed AU$20 billion over five years. NSW fast-tracked 15 projects worth AU$51.9 billion through its new investment approval body, while rejecting another AU$40 billion worth of proposals it considered premature. In a single week in April 2026, the sector pulled in over AU$6 billion in committed capital from global investors.
All of this infrastructure runs on electricity, and when the grid goes down, it runs on diesel. That is the part no one in the press release wants to talk about.
NSW environmental protection authority modelling, revealed at the state's data centre inquiry this week, looked at what happens if eight large Sydney basin data centres run their backup generators at the same time during a blackout. The one-hour air pollution output would be five to six times the emissions of all power generation in NSW, and five to six times the emissions of every motor vehicle in the state. One proposed campus on Mamre Road in Western Sydney would have 846 diesel generators, more than 18,000 kilolitres of diesel storage, and would draw 1.2 gigawatts of power: the first data centre in Australia to cross the 1 gigawatt mark. Schools and residents are already raising formal objections.
The industry's response is that this is a worst-case scenario: generators exist for emergencies, not regular operation, and each site is assessed individually against air quality rules. That is technically accurate. The problem is that the rules were written before dozens of these facilities were being clustered in the same suburban corridor. Individual assessments do not capture what happens when a city-wide blackout triggers simultaneous generator starts across 44 planned facilities.
NSW has a parliamentary inquiry running until September 2026 and a consultation paper out on data centre rules. The government has already signalled it wants to discourage diesel backup generators and push operators toward battery storage and gas. Whether that actually happens before approvals are locked in is the open question.
For business operators anywhere, the practical read here is straightforward. AI tools are becoming genuinely embedded in large Australian businesses, from banking to retail to universities. The local presence of OpenAI makes it easier to get support, run pilots, and engage with policy. That part is real.
The infrastructure question is a longer-term regulatory and cost issue. Businesses that rely on data centres, either as tenants or as customers of cloud services, should watch what comes out of the NSW inquiry in September. If generators get tightly regulated, or if data centres are required to fund grid upgrades themselves, that cost will eventually pass through to customers. The AI running your operations is cheap right now partly because those costs have not been fully priced.