Nemotron-ClimbMix

A 33% throughput gain kept this 3.848B pretraining run under $1,000

Hugo Vergnes reports 0.384 CORE from 65.3 billion tokens on eight rented B200s. The $998 buys 43 hours of node time, not the 139 GPU-hours of failed run that produced the recipe, and not the evenings that wrote the framework.