Towards Reasoning Ability of Small Language Models

• URL: http://arxiv.org/abs/2502.11569v1
• Date: Mon, 17 Feb 2025 08:59:16 GMT
• Title: Towards Reasoning Ability of Small Language Models
• Authors: Gaurav Srivastava, Shuxiang Cao, Xuan Wang,
• Abstract summary: We show that small language models (SLMs) can achieve competitive reasoning performance. We systematically survey, benchmark, and analyze 72 SLMs from six model families across 14 reasoning benchmarks. Our findings challenge the assumption that scaling is the only way to achieve strong reasoning.
• Score: 3.732224317444325
• License:
• Abstract: Reasoning has long been viewed as an emergent property of large language models (LLMs), appearing at or above a certain scale ($\sim$100B parameters). However, recent studies challenge this assumption, showing that small language models (SLMs) can also achieve competitive reasoning performance. SLMs are increasingly favored for their efficiency and deployability. However, there is a lack of systematic study on the reasoning abilities of diverse SLMs, including those trained from scratch or derived from LLMs through quantization, pruning, and distillation. This raises a critical question: Can SLMs achieve reasoning abilities comparable to LLMs? In this work, we systematically survey, benchmark, and analyze 72 SLMs from six model families across 14 reasoning benchmarks. For reliable evaluation, we examine four evaluation methods and compare four LLM judges against human evaluations on 800 data points. We repeat all experiments three times to ensure a robust performance assessment. Additionally, we analyze the impact of different prompting strategies in small models. Beyond accuracy, we also evaluate model robustness under adversarial conditions and intermediate reasoning steps. Our findings challenge the assumption that scaling is the only way to achieve strong reasoning. Instead, we foresee a future where SLMs with strong reasoning capabilities can be developed through structured training or post-training compression. They can serve as efficient alternatives to LLMs for reasoning-intensive tasks.

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