WeiboAI Releases VibeThinker-3B: MIT-Licensed 3B Reasoner Claiming 94.3 on AIME26, Matching 671B DeepSeek V3.2

Hugging Face·high signal

Weibo's AI lab open-weighted VibeThinker-3B, a 3-billion-parameter dense model fine-tuned from Qwen2.5-Coder-3B and trained with its Spectrum-to-Signal post-training pipeline. WeiboAI claims it scores 94.3 on AIME26, 80.2 Pass@1 on LiveCodeBench v6, and 96.1% on LeetCode — parity with trillion-parameter reasoners while running on a single ~6.7GB consumer GPU. Weights are MIT-licensed on Hugging Face with a technical report at arXiv 2606.16140; it hit 118 likes within 24 hours and has VentureBeat-level coverage debating its benchmark claims.