Colossus 1
xAI’s first Memphis supercluster, run under SpaceXAI. Anthropic agreed in May 2026 to use all of its compute capacity.
Colossus 1 is an operational GPU cluster run by xAI (SpaceXAI) in Memphis, Tennessee, United States. It has 220,000 NVIDIA H100, H200 and GB200 GPUs installed. Power: 300 MW.
Facts
Source per value- Owner / operator Organization that owns or operates the GPUs. Hosting and facility roles are listed under Partners.
- xAI (SpaceXAI) 1
- GPU maker NVIDIA, AMD or Intel, taken from the GPU model.
- NVIDIA 1
- GPU model Accelerator model or family as disclosed. A GH200 is one GPU on a superchip; an MI300A is an APU that contains a GPU.
- NVIDIA H100, H200 and GB200 1
- GPUs installed Physical GPUs in the cluster, from the operator or a deterministic sum of disclosed quantities (nodes × GPUs per node). Planned counts, H100-equivalents and unaudited press totals are never counted here.
- 220,000 3
- GPU count notes What the count covers (one partition, one site, a design limit), qualifiers and competing figures.
- Anthropic: over 220,000 NVIDIA GPUs (6 May 2026), the figure in the count column. Tom’s Hardware reports a mix of 150,000 H100, 50,000 H200 and 30,000 GB200 (230,000, press). 1
- Location City, region and country where the cluster sits. Empty when the operator does not name the site.
- Memphis, Tennessee, United States 2
- Country Country of the cluster, taken from the location.
- United States 2
- Live power MW Power in service, in megawatts of IT load where the source says so. Company figures are marked in the notes; Epoch AI satellite estimates are labelled as estimates.
- 300 3
- Planned power MW Planned or contracted power at full build, in megawatts.
- 300 3
- Power notes Basis and date of the power figures, and who published them.
- Anthropic (6 May 2026): all of Colossus 1, more than 300 MW and over 220,000 NVIDIA GPUs, online within the month. 1
- Status operational = running and named as such by the operator or a primary source; partly operational = a phase is live and more is coming; under construction = building underway; announced = disclosed or contracted with no confirmed go-live.
- operational 3
- Operational since Month or year the source gives for the cluster going live (first phase for partly operational clusters). Empty when no date is published.
- 2024 4
- Status notes The source’s wording on status, with the date.
- Anthropic agreed in May 2026 to use all of its compute capacity. 3
- Interconnect Cluster network fabric.
- NVIDIA Spectrum-X Ethernet 2
Sources
- tomshardware.com accessed 2026-11-11
- nvidianews.nvidia.com accessed 2026-11-11
- Anthropic: higher limits and SpaceX compute accessed 2026-11-11
- WSJ: xAI Memphis power accessed 2026-11-11
Related clusters
All 87 clustersLists
Need GPU capacity at this scale? Request quotes from GPU cloud providers
Tell us what you need once. We send it to matching GPU cloud providers and they reply to you directly.