Going from 3B/7B dense to Nemotron 3 Nano (hybrid Mamba-MoE) for multi-task reasoning — what changes in the fine-tuning playbook? [D]

April 26, 2026 at 11:42 AM · 0 reactions · 0 comments · 2 views

Following up on something I posted a few days back about fine-tuning for multi-task reasoning. Read a lot since then, and I've moved past the dense 3B vs 7B question — landing on Nemotron 3 Nano (the 30B-A3B hybrid Mamba-Attention-MoE NVIDIA released recently) instead. Architecture maps to the multi-task structure I'm trying to train better than a dense base. Problem is I've only ever read about dense transformer fine-tuning, so I don't know what the hybrid Mamba+MoE arch actually breaks in the

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Going from 3B/7B dense to Nemotron 3 Nano (hybrid Mamba-MoE) for multi-task reasoning — what changes in the fine-tuning playbook? [D]

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