Infinity Instruct: Scaling Instruction Selection and Synthesis to
  Enhance Language Models
Authors: name: Jijie Li; name: Li Du; name: Hanyu Zhao; name: Bo-wen Zhang; name: Liangdong Wang; name: Boyan Gao; name: Guang Liu; name: Yonghua Lin
Published: 2025-06-09 06:37:15

Abstract: Large Language Models (LLMs) demonstrate strong performance in real-world
applications, yet existing open-source instruction datasets often concentrate
on narrow domains, such as mathematics or coding, limiting generalization and
widening the gap with proprietary models. To bridge this gap, we introduce
Infinity-Instruct, a high-quality instruction dataset designed to enhance both
foundational and chat capabilities of LLMs through a two-phase pipeline. In
Phase 1, we curate 7.4M high-quality foundational instructions
(InfInstruct-F-7.4M) from over 100M samples using hybrid data selection
techniques. In Phase 2, we synthesize 1.5M high-quality chat instructions
(InfInstruct-G-1.5M) through a two-stage process involving instruction
selection, evolution, and diagnostic filtering. We empirically evaluate
Infinity-Instruct by fine-tuning several open-source models, including Mistral,
LLaMA, Qwen, and Yi, and observe substantial performance gains across both
foundational and instruction following benchmarks, consistently surpassing
official instruction-tuned counterparts. Notably, InfInstruct-LLaMA3.1-70B
outperforms GPT-4-0314 by 8.6\% on instruction following tasks while achieving
comparable foundational performance. These results underscore the synergy
between foundational and chat training and offer new insights into holistic LLM
development. Our
datasethttps://huggingface.co/datasets/BAAI/Infinity-Instruct and
codeshttps://gitee.com/li-touch/infinity-instruct have been publicly
released.