BF16 vs NVFP4 with Nemotron 3.5 Lightning

Learn how NVFP4 compares to BF16 in practice, why the smaller checkpoint frees up GPU memory without a big quality hit, and where each format still makes the most sense.

Using Nemotron 3.5 Lightning, which ships as both a BF16 and an NVFP4 checkpoint, we look at memory footprint, throughput, and accuracy, then walk through a notebook that runs the whole comparison on a single H100 so you can reproduce these results.