Microsoft Project Osmium

Compute capacity

155.6K H100e

IT power

190 MW

Capital cost

$7.2B

Microsoft Project Osmium is an AI data center operated by Microsoft, located in the United States (5855 SW Kerry St, Cumming, IA 50061). Its compute is used by OpenAI.

The site holds roughly 155,634 H100-equivalents of AI compute. It draws about 190 MW of power. Building and equipping it represents an estimated $7.2B of capital in 2025 dollars. It currently runs A100, H100, B200.

These figures are modelled estimates, not disclosures: Epoch AI derives them from permits, satellite imagery and reported spending, with an uncertainty of roughly 1.4x to 1.6x depending on the metric.

Timeline

Compute (H100e): 0 (2018-12-18) → 155.6K (2026-06-16)

Full record

Owner: Microsoft
Ownership confidence: Confident
Users: OpenAI (speculative)
Country: United States
Location: 5855 SW Kerry St, Cumming, IA 50061
H100 equivalents: 155,634
Power: 190 MW
Total capital cost: $7.2B
Current chips: A100, H100, B200
All chips: A100, H100, B200