Status: Operational (Phase 1 Live Oct 2025; Phase 2 Construction 2026) | Location: New Carlisle indiana
Formally activated in October 2025, Project Rainier is AWS's flagship AI infrastructure project. Named after the 14,410-foot stratovolcano, the campus is the primary training ground for Anthropic's Claude models. Unlike most hyperscale sites, Rainier is built around AWS Trainium2 chips rather than NVIDIA GPUs; as of March 2026, the site operates over 500,000 Trainium2 chips, with plans to scale to 1 million. The facility uses "UltraClusters" (64 chips linked across servers) to provide five times the compute power of previous generations. Technically, the site is a pioneer in "outside air" cooling, operating from October to March with zero water usage. While the initial $11 billion investment is operational, a proposed $15 billion expansion (Project Rainier Phase 2) met local zoning pushback in late 2025, leading AWS to diversify into neighboring counties.
From an architectural standpoint, Project Rainier reflects AWS’s shift toward vertically integrated AI infrastructure, combining custom silicon, optimized networking, and purpose-built data center design. The deployment of Trainium2 enables tighter cost control over large-scale model training, reducing reliance on third-party GPU supply chains while improving performance-per-watt efficiency. The UltraCluster configuration is supported by high-bandwidth, low-latency networking fabric, allowing distributed training workloads to scale with minimal communication overhead. Additionally, AWS is investing heavily in substation upgrades and transmission interconnects to sustain the site’s multi-hundred-megawatt demand profile. The expansion strategy beyond the core campus indicates a hub-and-spoke model, where satellite facilities can absorb incremental capacity while mitigating regulatory risk. This approach not only accelerates deployment timelines but also positions AWS to maintain long-term leadership in AI infrastructure amid intensifying competition.
| Field | Value |
|---|---|
| Project Name | AWS Project Rainier: $11B 2.2GW Anthropic AI Cluster Indiana |
| Location | New Carlisle indiana |
| Status | Operational (Phase 1 Live Oct 2025; Phase 2 Construction 2026) |
| Project Type | Custom Silicon AI Supercluster (Trainium-Native) |
| Commissioning | 🔒 Subscriber Intelligence |
| Total IT Load | 🔒 Subscriber Intelligence |
| Total Capacity | 🔒 Subscriber Intelligence |
| Tier Level | 🔒 Subscriber Intelligence |
| Header | Details |
|---|---|
| City Name | New Carlisle |
| Population | ~5,700 |
| Urban Agglomeration | ~134,000 |
| Economic Profile | 🔒 Detailed city intelligence available to subscribers |
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