What changed — SpaceXAI (xAI)
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Capacity, status, permit, grid-request and construction changes over the last three years, each with its source. A change means the same source reported a new value later; two sources disagreeing is not a change. Follow a facility, company, utility, state or ISO by email, or subscribe to the feed in any RSS reader.
Each change is tagged by evidence: ConfirmedBacked by a filing, deed, permit, interconnection-queue record, or a government or utility record. filing, deed, permit or grid recordAnnouncedStated by the company or reported in the press; not yet backed by a filing or grid record. company or press claimEst.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. satellite, model or map inferenceHow levels are assigned
2023-112026-10
- Jul 10, 2026xAI QTS Atlanta · GA
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Status: Operating + expanding → Operating
Source: Epoch AI - Jun 15, 2026Colossus 1 · TN
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Status: Operating + expanding → Operating
Source: Epoch AI - Jun 15, 2026Colossus 2 · MS
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current IT capacity: 490 MW → 946 MW
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current facility power: 661 MW → 1.28 GW
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Buildings operational: 1 → 2
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.New capacity online: The site is estimated to have at least ~830 MW of GPU server power, with at least "at least 220,000 additional GB300 processors and over 400 additional megawatts of compute power", corresponding to the "next phase of …
Source: Epoch AI - Apr 6, 2026Colossus 2 · MS
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current IT capacity: 239 MW → 490 MW
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current facility power: 323 MW → 661 MW
Source: Epoch AI - Feb 11, 2026Colossus 1 · TN
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current facility power: 442 MW → 425 MW
Source: Epoch AI - Nov 7, 2025Colossus 1 · TN
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current IT capacity: 268 MW → 340 MW
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current facility power: 348 MW → 442 MW
Source: Epoch AI - Oct 19, 2025Colossus 2 · MS
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Buildings operational: 0 → 1
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Status: Under construction → Operating + expanding
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.New capacity online: Battery facility looks complete (though more might be added). Turbines look connected up, minimal construction around them. We believe this state corresponds to the first compute cluster brought online at this site of…
Source: Epoch AI - Sep 17, 2025Colossus 1 · TN
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current IT capacity: 340 MW → 268 MW
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current facility power: 442 MW → 348 MW
Source: Epoch AI - Jul 22, 2025Colossus 1 · TN
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current IT capacity: 278 MW → 340 MW
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current facility power: 361 MW → 442 MW
Source: Epoch AI - Feb 28, 2025Colossus 2 · MS
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Construction started: Land clearing begins next to the existing building.
Source: Epoch AI - Feb 20, 2025xAI QTS Atlanta · GA
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Buildings operational: 0 → 1
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Status: Under construction → Operating + expanding
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.New capacity online: xAI's GPU cluster in the QTS Atlanta building at 1025 Jefferson Street NW is operational around this time. This date is a tentative estimate: Business Insider reported the buildout in February 2025, so the cluster lik…
Source: Epoch AI - Feb 17, 2025Colossus 1 · TN
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current IT capacity: 139 MW → 278 MW
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current facility power: 181 MW → 361 MW
Source: Epoch AI - Sep 2, 2024Colossus 1 · TN
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current IT capacity: 35 MW → 139 MW
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Current facility power: 45 MW → 181 MW
Source: Epoch AI - Aug 11, 2024Colossus 1 · TN
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Buildings operational: 0 → 1
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Status: Under construction → Operating + expanding
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.New capacity online: First significant/useful training workload on 25k H100s.
Source: Epoch AI - Apr 24, 2024Colossus 1 · TN
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Construction started: Construction starts with a road added on site, retrofitting a former Electrolux building.
Source: Epoch AI - Jan 23, 2024xAI QTS Atlanta · GA
- Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Construction started: X Corp's $700 million investment in AI training hardware for the Atlanta data center is approved by the Development Authority of Fulton County (bond resolution fact sheet).
Source: Epoch AI