You’ve heard that one before, right? It’s the common refrain in every fitness class ever, and in the majority of the bro-centric, muscle-building gyms out there. It’s not bad, either. It’s a refrain ...

This weekend, the xAI team brought the Colossus 100k H100 training cluster online. From start to finish, it was done in 122 days. Colossus is the most powerful AI training system in the world.

The race to build 100,000-GPU training clusters is exposing the optical interconnect as a critical variable in AI infrastructure performance. As model complexity and dataset scale push cluster sizes ...