arXiv AI By Ning Zhang, Shihao Wang, Jinrui Zhang, Chaodong Xiao, Lei Zhang

BitMTP: When Multi-Token Prediction Meets Low-Bit Large Language Models

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BitMTP is an algorithm‑system co‑design framework that combines multi‑token prediction (MTP) with ultra‑low‑bit large language model backbones to accelerate decoding while maintaining quality. It introduces joint next‑token and MTP objectives, multiple decoding modes (confidence‑only, speculative‑only, hybrid), and an accepted‑prefix alignment mechanism that keeps causal key‑value boundaries and CUDA Graph replay states consistent. Experiments on NVIDIA H20, RTX 3090, and Jetson Orin show speedups ranging from 2.0× to 3.3× across various ultra‑low‑bit models without sacrificing task performance.

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