Alexx Forge

Colossus Ledger

Aug 2026 · Current public state

Multi-building public state

Observed

Campus schematic

Density · interconnect · generation

Detail

Colossus 2 / Macrohard

Memphis–Southaven (TN–MS line)

Operational — primary training

Relative density

Instrument index — not a GPU count

Public statements place current Grok training and additional tenants on Colossus 2. Independent estimates of H100-equivalent compute are much larger than the original 200k page figure and are tagged Observed.

Role: Primary training + additional tenants
Tracker estimate (H100-eq): ~1.1M (Epoch, Aug 2026)
Tracker IT power: ~946 MW (Epoch, Aug 2026)

This milestone

Multi-building complex. Colossus 1 reported as fully leased. Colossus 2 described as the primary training site with multiple models in training. Power generation is in a documented transition from temporary turbines to a permanent plant.

x.ai/colossus
x.ai/memphis/updates
Public statements and independent tracking

Timeline

Aug 2026 — Current public state

Observed

Signal

As of Aug 2026

2025 · xAI / SpaceXAI
Built in 122 days — then doubled in 92 days to 200k GPUs. This is just the beginning.
Jan 2026 · Elon Musk
The Colossus 2 supercomputer for Grok is now operational. First gigawatt training cluster in the world.
May 6, 2026 · SpaceXAI
SpaceXAI will provide Anthropic with access to Colossus 1, one of the world’s largest and fastest-deployed AI supercomputers.
May 2026 · Elon Musk
We have many great Grok models training simultaneously in Colossus 2.
May 18, 2026 · Elon Musk
Cursor Composer 2.5 — partially trained on Colossus 2.
May 28, 2026 · Elon Musk
Colossus 1 lease described as 180 days with 90-day mutual cancellation — not a multi-year commitment.
Jul 30, 2026 · SpaceXAI Memphis
Agreed order to remove all 69 temporary mobile turbines by July 2027 as the 1.2 GW permanent plant comes online.