Microsoft Project Osmium is an operational AI data center with AI chips owned by Microsoft and used by OpenAI (speculative). It hosts an estimated 156k H100-equivalents of compute, supported by 190 MW of IT power at a capital cost of $7.2 B. We estimate that it uses Nvidia A100, Nvidia H100, and Nvidia B200 chips.

The timeline of IT power and compute capacity is based on satellite imagery, our cooling equipment power model, company disclosures, chip availability, and chip efficiency.

One building reportedly contained roughly 25,000 A100s used by OpenAI to train GPT-3.5.