What changed — SpaceXAI (xAI)

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. Subscribe to the feed in any RSS reader to follow a facility, state or company.

1. Jul 10, 2026
   xAI QTS Atlanta · GA

   • Status: Operating + expanding → Operating

   Source: Epoch AI
2. Jun 15, 2026
   Colossus 1 · TN

   • Status: Operating + expanding → Operating

   Source: Epoch AI
3. Jun 15, 2026
   Colossus 2 · TN

   • Current IT capacity: 490 MW → 946 MW
   • Current facility power: 661 MW → 1.28 GW
   • Buildings operational: 1 → 2
   • 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
4. Apr 6, 2026
   Colossus 2 · TN

   • Current IT capacity: 239 MW → 490 MW
   • Current facility power: 323 MW → 661 MW

   Source: Epoch AI
5. Feb 11, 2026
   Colossus 1 · TN

   • Current facility power: 442 MW → 425 MW

   Source: Epoch AI
6. Nov 7, 2025
   Colossus 1 · TN

   • Current IT capacity: 268 MW → 340 MW
   • Current facility power: 348 MW → 442 MW

   Source: Epoch AI
7. Oct 19, 2025
   Colossus 2 · TN

   • Buildings operational: 0 → 1
   • Status: Under construction → Operating + expanding
   • 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
8. Sep 17, 2025
   Colossus 1 · TN

   • Current IT capacity: 340 MW → 268 MW
   • Current facility power: 442 MW → 348 MW

   Source: Epoch AI
9. Jul 22, 2025
   Colossus 1 · TN

   • Current IT capacity: 278 MW → 340 MW
   • Current facility power: 361 MW → 442 MW

   Source: Epoch AI
10. Feb 28, 2025
    Colossus 2 · TN

    • Construction started: Land clearing begins next to the existing building.

    Source: Epoch AI
11. Feb 20, 2025
    xAI QTS Atlanta · GA

    • Buildings operational: 0 → 1
    • Status: Under construction → Operating + expanding
    • 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
12. Feb 17, 2025
    Colossus 1 · TN

    • Current IT capacity: 139 MW → 278 MW
    • Current facility power: 181 MW → 361 MW

    Source: Epoch AI
13. Sep 2, 2024
    Colossus 1 · TN

    • Current IT capacity: 35 MW → 139 MW
    • Current facility power: 45 MW → 181 MW

    Source: Epoch AI
14. Aug 11, 2024
    Colossus 1 · TN

    • Buildings operational: 0 → 1
    • Status: Under construction → Operating + expanding
    • New capacity online: First significant/useful training workload on 25k H100s.

    Source: Epoch AI
15. Apr 24, 2024
    Colossus 1 · TN

    • Construction started: Construction starts with a road added on site, retrofitting a former Electrolux building.

    Source: Epoch AI
16. Jan 23, 2024
    xAI QTS Atlanta · GA

    • 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