SpaceX is building a new Minihard data center adjacent to Macrohard and Macrohardrr at the Memphis campus. The buildings become interchangeable capacity units instead of one-off snowflakes. Conventional build is 18 months but Minihard will be ~4 months. AI6 Minihard in 2028AI6 — tape-out targeted December 2026 — is the one Musk has explicitly described as for Optimus and data centers. This could cost $4 billion per AI6 Minihard instead of $12 billion for GB300 Minihard.