Nemotron 3.5 Lightning 30B A3B BF16
NVIDIA · 2026-08-11 · 32.9B parameters
NVIDIA's BF16 reference release of Nemotron 3.5 Lightning, a hybrid Mamba-2, attention and mixture-of-experts language model with optional thinking. The official card documents a 1,048,576-token maximum context and an August 11 release; Fireworks explicitly links its nemotron-lightning-3p5-30b-a3b endpoint to this checkpoint. NVIDIA reports approximately 3B active parameters and NVFP4 pretraining; BF16 describes the distributed weights and is not silently assigned as the training precision.