想看看3B小模型怎么打平千亿级大模型？VibeThinker-3B用AIME 94.3分、LiveCodeBench 80.2%的成绩告诉你，小模型也能杀进顶级推理梯队。
VibeThinker-3B是一个3B参数的小型稠密模型，基于Spectrum-to-Signal后训练范式，通过课程监督微调、多域强化学习和离线自蒸馏提升。在AIME26上达到94.3分（测试时扩展至97.1），LiveCodeBench v6上Pass@1为80.2，最新LeetCode竞赛接受率96.1%。其性能与DeepSeek V3.2、GLM-5和Gemini 3 Pro等旗舰大模型相当或超越。IFEval得分为93.4，表明强推理未损害指令遵循能力。该工作提出了参数压缩-覆盖假说：可验证推理可压缩为紧凑推理核心，而开放域知识需宽参数覆盖。
VibeThinker-3B: Exploring the Frontier of Verifiable Reasoning in Small Language Models
This technical report introduces VibeThinker-3B, a compact dense model with 3B parameters developed to investigate how far verifiable reasoning can be pushed within a strictly small-model regime. Building upon the Spectrum-to-Signal post-training paradigm, we systematically enhance the model through an optimized pipeline that includes curriculum-based supervised fine-tuning, multi-domain reinforcement learning, and offline self-distillation. Experimental evaluations demonstrate that VibeThinker-3B achieves frontier-level performance on highly demanding verifiable tasks. Specifically, it attains a score of 94.3 on AIME26 (improving to 97.1 with claim-level test-time scaling), an 80.2 Pass@1 on LiveCodeBench v6, and exhibits strong out-of-distribution generalization with a 96.1\% acceptance rate on recent unseen LeetCode contests. This effectively places it in the performance band of first-tier reasoning systems, matching or exceeding flagship models that are orders of magnitude larger, such as DeepSeek V3.2, GLM-5, and Gemini 3 Pro. Furthermore, a score of 93.4 on IFEval confirms that this extreme reasoning enhancement does not compromise strict instruction controllability. Extending our previous 1.5B work, these findings motivate the Parametric Compression-Coverage Hypothesis, which views verifiable reasoning as compressible into compact reasoning cores, while open-domain knowledge and general-purpose competence require broad parameter coverage over facts, concepts, and long-tail scenarios. This perspective suggests that compact models are not merely deployment-efficient substitutes, but a complementary path toward frontier-level performance in parameter-dense capability regimes.