Frontier AI datacentre
Anthropic Lake Mariner
42 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source378 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026SourceAnthropic Lake Mariner 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 |
| Anthropic Lake Mariner | AI XPV Platform | Anthropic | United States | 42 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 378 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 31 Mar 2027 |
Site details
- Owner
- AI XPV Platform
- Users
- Anthropic
- Country
- United States
- IT power online now
- estimate at 23 Jul 2026
42 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source - Largest planned IT power
378 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source- Planned date
- 31 Mar 2027
Latest construction note
Building 1 looks complete, consistent with it going operational back in May. Building 2 is mostly complete, with the row of backup generators on the east side of the building still being installed. Building 3 shell is complete, with rooftop coolers midway through installation, an
Note from Epoch AI, Frontier Data Centers (epoch.ai/data/data-centers) (CC BY 4.0).
Questions
Who owns Anthropic Lake Mariner?
Epoch AI's register lists AI XPV Platform as the owner of Anthropic Lake Mariner, in the United States.
Who uses Anthropic Lake Mariner?
The register lists Anthropic as the users of the site.
How much power does Anthropic Lake Mariner have?
42 MW of IT power was online at the latest estimate in the register, against 378 MW planned, 11% of the plan (calculated). Snapshot of 14 Oct 2026.
When will Anthropic Lake Mariner be finished?
Epoch AI's timeline puts the site's largest planned IT power, 378 MW, at Mar 2027. 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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