Xwin-LM: Strong and Scalable Alignment Practice for LLMs
Authors: name: Bolin Ni, name: JingCheng Hu, name: Yixuan Wei, name: Houwen Peng, name: Zheng Zhang, name: Gaofeng Meng, name: Han Hu

In this work, we present Xwin-LM, a comprehensive suite of alignment
methodologies for large language models (LLMs). This suite encompasses several
key techniques, including supervised finetuning (SFT), reward modeling (RM),
rejection sampling finetuning (RS), and direct preference optimization (DPO).
The key components are as follows: (1) Xwin-LM-SFT, models initially finetuned
with high-quality instruction data; (2) Xwin-Pair, a large-scale, multi-turn
preference dataset meticulously annotated using GPT-4; (3) Xwin-RM, reward
models trained on Xwin-Pair, developed at scales of 7B, 13B, and 70B
parameters; (4) Xwin-Set, a multiwise preference dataset in which each prompt
is linked to 64 unique responses generated by Xwin-LM-SFT and scored by
Xwin-RM; (5) Xwin-LM-RS, models finetuned with the highest-scoring responses
from Xwin-Set; (6) Xwin-LM-DPO, models further optimized on Xwin-Set using the
DPO algorithm. Our evaluations on AlpacaEval and MT-bench demonstrate
consistent and significant improvements across the pipeline, demonstrating the
strength and scalability of Xwin-LM. The repository
https://github.com/Xwin-LM/Xwin-LM will be continually updated to foster
community research.