Cipher Barber Lake (Fluidstack)
AI data center in Texas, operated by Fluidstack.
Cipher Mining's Barber Lake site in Texas, leased for 10 years to Fluidstack with Google backing. Cipher's SEC filing gives 207 MW of critical IT load across two phases.
- Live power
- —
- Planned power
- 300MW 1
- Status
- Under construction
- Accelerators
- —
Power: what each source says
168 MW critical IT in phase 1 (Cipher, 2025-09-25); 207 MW critical IT / 300 MW gross after the 56 MW-gross add-on (Cipher 8-K, Nov 2025). Epoch AI satellite review 2026-07-30: shell complete, not yet energized; Epoch estimates phase 1 live ~2026-12.
Figures labelled Epoch AI are estimates from satellite imagery, permits and filings. Company figures come from the operator, owner or its filings. IT power is what the servers draw; in Epoch AI’s figures for these campuses it runs about 15–35% below total facility power.
Tenants
Part reported Fluidstack; Anthropic (per Epoch AI)
“Reported” means a press outlet or Epoch AI named the tenant and neither the operator nor the tenant has confirmed it. The outlet is named in brackets and listed under sources.
Campus facts
- Operator
- Fluidstack 1
- Owner / developer
- Cipher Mining 1
- City
- Not published
- State / region
- Texas 1
- Country
- United States 1
- First power
- 2026 1
- Chips
- Google TPU (likely, per Epoch AI) 1
- GPUs / accelerators
- Not published
- Cooling
- Not published
- Power source
- grid (ERCOT) 1
- Coordinates
- Exact site undisclosed
- Verified
Sources
- Cipher Mining: 168 MW 10-year AI hosting agreement with Fluidstack (2025-09-25) accessed 2026-11-09
- Cipher Mining 8-K exhibit 99.1 (Nov 2025) accessed 2026-11-09
- Epoch AI, AI data centers dataset (CC-BY 4.0, updated 2026-11-06) (licence: CC BY 4.0) accessed 2026-11-09