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4d ago

Musk Unveils Colossus 2, a Gigawatt-Scale xAI Supercomputer to Train Grok 5

Musk says training of Grok 5 on the system begins in September.

XAI, Google, OpenAI and Meta Race to Gigawatts of AI Data Centers

Overview

  • Musk claims Colossus 2 will be the first gigawatt‑plus AI training supercomputer and gives what he calls a non‑trivial chance at AGI.
  • xAI is reported to be investing more than $40 billion at the Colossus site with 208 Tesla Megapacks in use at Colossus 1 and a planned 500‑acre solar farm to support future load.
  • NextBigFuture reports Phase 1 of Colossus 2 was expected online in late July or early August with a path to roughly 1 gigawatt by January 2026 and potential expansion to 3 gigawatts, timelines that are developing and not independently verified.
  • Rivals are pursuing comparable builds, with reporting that OpenAI’s Stargate and Meta’s Prometheus target roughly 1‑gigawatt superclusters and hundreds of thousands of GPUs coming online through 2026.
  • Musk reiterated a goal of deploying 50 million H100‑equivalent GPUs within five years and said Grok 2.5 is now open source, with Grok 3 expected to follow in about six months.