xAI Colossus 1

Headline capacity

Not established in published records

Updated

Oct 28, 2026

Utility

Memphis Light Gas and Water

Colossus 1 is the original xAI supercomputer in the former Electrolux factory on Paul R. Lowry Road in southwest Memphis. The company reported a 100,000-GPU cluster in December 2024 and an expansion to 200,000 GPUs in February 2025. On May 6, 2026, the operator described more than 220,000 NVIDIA GPUs, including H100, H200 and GB200 accelerators. Anthropic announced an agreement to use all of the facility’s compute capacity, describing access to more than 300 MW within that month. That commercial compute-access figure is distinct from measured operating IT load. MLGW’s May 5, 2025 update documented 150 MW of grid service and a separate request for another 150 MW. The original facility is separate from the Tulane Road Colossus 2 development and the Southaven facilities. Phoenix Investors reported in March 2025 that the former factory had been leased to xAI. SELC reported that an appeal filed in July 2025 over the original site’s air permit was dismissed as moot in December 2025. Present grid availability, metered water use and the current cooling configuration are not established by these dated disclosures. May 29, 2026 SEC correspondence describes the Anthropic compute agreement across both Colossus and Colossus II; its combined commercial value is not an original-site financing amount.