Aakash Gupta
@aakashgupta · Dec 13, 2025
Everyone’s focused on the $400 million battery price tag. That misses the point entirely.
xAI just told you power is now the binding constraint on AI training, and most people haven’t repriced what that means.
The math: Colossus 2 needs 1+ gigawatts to run at full capacity.
Sawyer Merritt@SawyerMerritt· Dec 13, 2025xAI has shared a photo of its new @Tesla Megapack battery energy storage system at its new Colossus 2 datacenter in Memphis, the largest in the world.
There are ~420 Megapacks worth about $400 million.
Elon Musk
@elonmusk
Yeah
02:27 AM · December 14, 2025 · 124K views
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