xAI

Elon Musk's AI company; builds the Grok models and the large Colossus GPU cluster.

Palo Alto, CA, US · 2023

Analysis as of Jun 5, 2025

Is frontier AI investment a bubble?

by Frontier Milestones

US private AI investment hit $109B in 2024 — then 2025's efficiency shock (DeepSeek) made the bubble question sharper, not simpler. Our read on whether capital is ahead of capability. (Our opinion, not investment advice.)

Our read — labelled opinion, not investment advice.

Frontier AI

OpenAI

Anthropic

xAI

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Milestone note 2025

Gigawatt-class cluster online

Reached

xAI (Colossus) — Colossus scaled to ~200,000 GPUs and gigawatt-class power as GB200 racks came online — the first single site to approach 1 GW of AI compute.

AI Data Centers

xAI

Press · 2024-09 Read

Milestone note Sep 2024

First 100,000-GPU training cluster

Reached

xAI (Colossus) — xAI brought its Colossus cluster in Memphis online with ~100,000 H100 GPUs (~150 MW), built in months — the first single cluster at six-figure GPU scale.

AI Data Centers

xAI

Press · 2024-09 Read