Frontier AI datacentre
Amazon Madison Mega Site
284 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source683 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026SourceAmazon Madison Mega Site among the largest sites in the United States
| Site | Owner | Users | Country | Online now | Planned | Planned date |
|---|---|---|---|---|---|---|
| Microsoft Fairwater Wisconsin | Microsoft | OpenAI, Microsoft | United States | 369 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 2.26 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 13 May 2028 |
| Anthropic-Amazon New Carlisle | Amazon | Anthropic | United States | 910 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.93 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 17 Mar 2028 |
| OpenAI Stargate New Mexico | Oracle | OpenAI | United States | 0 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.75 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 31 Dec 2028 |
| Meta Hyperion | Meta | Meta | United States | 0 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.63 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1 Jan 2028 |
| Colossus 2 | SpaceXAI | Anthropic, Cursor, SpaceXAI | United States | 946 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.53 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 25 Feb 2027 |
| OpenAI Stargate Shackelford | Oracle | OpenAI | United States | 0 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.40 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 11 Nov 2028 |
| QTS Cedar Rapids | Not stated | Not stated | United States | 0 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.13 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 15 Nov 2027 |
| Amazon Madison Mega Site | Amazon | Anthropic | United States | 284 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 683 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 15 Mar 2028 |
Site details
- Owner
- Amazon
- Users
- Anthropic
- Country
- United States
- IT power online now
- estimate at 4 Jun 2026
284 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source - Largest planned IT power
683 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source- Planned date
- 15 Mar 2028
Latest construction note
Buildings 6 and 7 roof completed. Building 8 roof nearly completed. Building 9 roof half way up. No new operational buildings.
Note from Epoch AI, Frontier Data Centers (epoch.ai/data/data-centers) (CC BY 4.0).
Questions
Who owns Amazon Madison Mega Site?
Epoch AI's register lists Amazon as the owner of Amazon Madison Mega Site, in the United States.
Who uses Amazon Madison Mega Site?
The register lists Anthropic as the users of the site.
How much power does Amazon Madison Mega Site have?
284 MW of IT power was online at the latest estimate in the register, against 683 MW planned, 42% of the plan (calculated). Snapshot of 14 Oct 2026.
When will Amazon Madison Mega Site be finished?
Epoch AI's timeline puts the site's largest planned IT power, 683 MW, at Mar 2028. Timelines are estimates and change as construction progresses.
Where does this datacentre data come from?
Epoch AI's Frontier Data Centers register (CC BY 4.0), which estimates each site's IT power over time from satellite imagery, permits and company statements. Figures are estimates, not company specifications.
Updated 14 Oct 2026. Source: Epoch AI, Frontier Data Centers (epoch.ai/data/data-centers) (CC BY 4.0). Estimates, not company specifications. Methodology: Pipeline Tracker. Not investment advice.
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